Bump v15.5.7

(cherry picked from commit 7f9431764f)
(cherry picked from commit 1b5738e308)

Co-authored-by: John Kleinschmidt <jkleinsc@electronjs.org>

.circleci/.gitignore

@@ -0,0 +1 @@
+config-staging

.circleci/config/build.js

@@ -0,0 +1,34 @@
+const cp = require('child_process');
+const fs = require('fs-extra');
+const path = require('path');
+const yaml = require('js-yaml');
+
+const STAGING_DIR = path.resolve(__dirname, '..', 'config-staging');
+
+function copyAndExpand(dir = './') {
+    const absDir = path.resolve(__dirname, dir);
+    const targetDir = path.resolve(STAGING_DIR, dir);
+
+    if (!fs.existsSync(targetDir)) {
+        fs.mkdirSync(targetDir);
+    }
+
+    for (const file of fs.readdirSync(absDir)) {
+        if (!file.endsWith('.yml')) {
+            if (fs.statSync(path.resolve(absDir, file)).isDirectory()) {
+                copyAndExpand(path.join(dir, file));
+            }
+            continue;
+        }
+
+        fs.writeFileSync(path.resolve(targetDir, file), yaml.dump(yaml.load(fs.readFileSync(path.resolve(absDir, file), 'utf8')), {
+            noRefs: true,
+        }));
+    }
+}
+
+if (fs.pathExists(STAGING_DIR)) fs.removeSync(STAGING_DIR);
+copyAndExpand();
+
+const output = cp.spawnSync(process.env.CIRCLECI_BINARY || 'circleci', ['config', 'pack', STAGING_DIR]);
+fs.writeFileSync(path.resolve(STAGING_DIR, 'built.yml'), output.stdout.toString());

.circleci/config/jobs/lint.yml

@@ -0,0 +1,51 @@
+executor:
+  name: linux-docker
+  size: medium
+steps:
+  - checkout:
+      path: src/electron
+  - run:
+      name: Setup third_party Depot Tools
+      command: |
+        # "depot_tools" has to be checkout into "//third_party/depot_tools" so pylint.py can a "pylintrc" file.
+        git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git src/third_party/depot_tools
+        echo 'export PATH="$PATH:'"$PWD"'/src/third_party/depot_tools"' >> $BASH_ENV
+  - run:
+      name: Download GN Binary
+      command: |
+        chromium_revision="$(grep -A1 chromium_version src/electron/DEPS | tr -d '\n' | cut -d\' -f4)"
+        gn_version="$(curl -sL "https://chromium.googlesource.com/chromium/src/+/${chromium_revision}/DEPS?format=TEXT" | base64 -d | grep gn_version | head -n1 | cut -d\' -f4)"
+
+        cipd ensure -ensure-file - -root . \<<-CIPD
+        \$ServiceURL https://chrome-infra-packages.appspot.com/
+        @Subdir src/buildtools/linux64
+        gn/gn/linux-amd64 $gn_version
+        CIPD
+
+        echo 'export CHROMIUM_BUILDTOOLS_PATH="'"$PWD"'/src/buildtools"' >> $BASH_ENV
+  - run:
+      name: Download clang-format Binary
+      command: |
+        chromium_revision="$(grep -A1 chromium_version src/electron/DEPS | tr -d '\n' | cut -d\' -f4)"
+
+        sha1_path='buildtools/linux64/clang-format.sha1'
+        curl -sL "https://chromium.googlesource.com/chromium/src/+/${chromium_revision}/${sha1_path}?format=TEXT" | base64 -d > "src/${sha1_path}"
+
+        download_from_google_storage.py --no_resume --no_auth --bucket chromium-clang-format -s "src/${sha1_path}"
+  - run:
+      name: Run Lint
+      command: |
+        # gn.py tries to find a gclient root folder starting from the current dir.
+        # When it fails and returns "None" path, the whole script fails. Let's "fix" it.
+        touch .gclient
+        # Another option would be to checkout "buildtools" inside the Electron checkout,
+        # but then we would lint its contents (at least gn format), and it doesn't pass it.
+
+        cd src/electron
+        node script/yarn install --frozen-lockfile
+        node script/yarn lint
+  - run:
+      name: Run Script Typechecker
+      command: |
+        cd src/electron
+        node script/yarn tsc -p tsconfig.script.json

.circleci/config/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "@electron/circleci-config",
+  "version": "0.0.0",
+  "private": true,
+  "license": "MIT",
+  "dependencies": {
+    "fs-extra": "^10.1.0",
+    "js-yaml": "^4.1.0"
+  }
+}

.circleci/config/yarn.lock

@@ -0,0 +1,43 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+argparse@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-2.0.1.tgz#246f50f3ca78a3240f6c997e8a9bd1eac49e4b38"
+  integrity sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==
+
+fs-extra@^10.1.0:
+  version "10.1.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-10.1.0.tgz#02873cfbc4084dde127eaa5f9905eef2325d1abf"
+  integrity sha512-oRXApq54ETRj4eMiFzGnHWGy+zo5raudjuxN0b8H7s/RU2oW0Wvsx9O0ACRN/kRq9E8Vu/ReskGB5o3ji+FzHQ==
+  dependencies:
+    graceful-fs "^4.2.0"
+    jsonfile "^6.0.1"
+    universalify "^2.0.0"
+
+graceful-fs@^4.1.6, graceful-fs@^4.2.0:
+  version "4.2.10"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.10.tgz#147d3a006da4ca3ce14728c7aefc287c367d7a6c"
+  integrity sha512-9ByhssR2fPVsNZj478qUUbKfmL0+t5BDVyjShtyZZLiK7ZDAArFFfopyOTj0M05wE2tJPisA4iTnnXl2YoPvOA==
+
+js-yaml@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.1.0.tgz#c1fb65f8f5017901cdd2c951864ba18458a10602"
+  integrity sha512-wpxZs9NoxZaJESJGIZTyDEaYpl0FKSA+FB9aJiyemKhMwkxQg63h4T1KJgUGHpTqPDNRcmmYLugrRjJlBtWvRA==
+  dependencies:
+    argparse "^2.0.1"
+
+jsonfile@^6.0.1:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-6.1.0.tgz#bc55b2634793c679ec6403094eb13698a6ec0aae"
+  integrity sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==
+  dependencies:
+    universalify "^2.0.0"
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
+universalify@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/universalify/-/universalify-2.0.0.tgz#75a4984efedc4b08975c5aeb73f530d02df25717"
+  integrity sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==

.devcontainer/README.md

@@ -1,59 +0,0 @@
-# Electron Dev on Codespaces
-
-Welcome to the Codespaces Electron Developer Environment.
-
-## Quick Start
-
-Upon creation of your codespace you should have [build tools](https://github.com/electron/build-tools) installed and an initialized gclient checkout of Electron.  In order to build electron you'll need to run the following commands.
-
-```bash
-e sync -vv
-e build
-```
-
-The initial sync will take approximately ~30 minutes and the build will take ~8 minutes.  Incremental syncs and incremental builds are substantially quicker.
-
-## Directory Structure
-
-Codespaces doesn't lean very well into gclient based checkouts, the directory structure is slightly strange.  There are two locations for the `electron` checkout that both map to the same files under the hood.
-
-```graphql
-# Primary gclient checkout container
-/workspaces/gclient/*
-  └─ src/* - # Chromium checkout
-     └─ electron - # Electron checkout
-# Symlinked Electron checkout (identical to the above)
-/workspaces/electron
-```
-
-## Goma
-
-If you are a maintainer [with Goma access](../docs/development/goma.md) it should be automatically configured and authenticated when you spin up a new codespaces instance.  You can validate this by checking `e d goma_auth info` or by checking that your build-tools configuration has a goma mode of `cluster`.
-
-## Running Electron
-
-You can run Electron in a few ways.  If you just want to see if it launches:
-
-```bash
-# Enter an interactive JS prompt headlessly
-xvfb-run e start -i
-```
-
-But if you want to actually see Electron you will need to use the built-in VNC capability.  If you click "Ports" in codespaces and then open the `VNC web client` forwarded port you should see a web based VNC portal in your browser.  When you are asked for a password use `builduser`.
-
-Once in the VNC UI you can open `Applications -> System -> XTerm` which will open a VNC based terminal app and then you can run `e start` like normal and Electron will open in your VNC session.
-
-## Running Tests
-
-You run tests via build-tools and `xvfb`.
-
-```bash
-# Run all tests
-xvfb-run e test
-
-# Run the main process tests
-xvfb-run e test --runners=main
-
-# Run the old remote tests
-xvfb-run e test --runners=remote
-```

.devcontainer/devcontainer.json

@@ -1,43 +0,0 @@
-{
-	"dockerComposeFile": "docker-compose.yml",
-	"service": "buildtools",
-	"onCreateCommand": ".devcontainer/on-create-command.sh",
-	"workspaceFolder": "/workspaces/gclient/src/electron",
-	"extensions": [
-		"joeleinbinder.mojom-language",
-		"rafaelmaiolla.diff",
-		"surajbarkale.ninja",
-		"ms-vscode.cpptools",
-		"mutantdino.resourcemonitor",
-		"dbaeumer.vscode-eslint",
-		"shakram02.bash-beautify",
-		"marshallofsound.gnls-electron"
-	],
-	"settings": {
-		"[gn]": {
-			"editor.formatOnSave": true
-		},
-		"editor.tabSize": 2,
-		"bashBeautify.tabSize": 2
-	},
-	"forwardPorts": [8088, 6080, 5901],
-	"portsAttributes": {
-		"8088": {
-			"label": "Goma Control Panel",
-			"onAutoForward": "silent"
-		},
-		"6080": {
-			"label": "VNC web client (noVNC)",
-			"onAutoForward": "silent"
-		},
-		"5901": {
-			"label": "VNC TCP port",
-			"onAutoForward": "silent"
-		}
-	},
-	"hostRequirements": {
-		"storage": "32gb",
-		"cpus": 8
-	},
-	"remoteUser": "builduser"
-}

.devcontainer/docker-compose.yml

@@ -1,19 +0,0 @@
-version: '3'
-
-services:
-  buildtools:
-    image: ghcr.io/electron/devcontainer:27db4a3e3512bfd2e47f58cea69922da0835f1d9
-
-    volumes:
-      - ..:/workspaces/gclient/src/electron:cached
-
-      - /var/run/docker.sock:/var/run/docker.sock 
-
-    command: /bin/sh -c "while sleep 1000; do :; done"  
-
-    user: builduser
-
-    cap_add:
-      - SYS_PTRACE
-    security_opt:
-      - seccomp:unconfined

.devcontainer/on-create-command.sh

@@ -1,74 +0,0 @@
-#!/bin/bash
-
-set -eo pipefail
-
-buildtools=$HOME/.electron_build_tools
-gclient_root=/workspaces/gclient
-buildtools_configs=/workspaces/buildtools-configs
-
-export PATH="$PATH:$buildtools/src"
-
-# Create the persisted buildtools config folder
-mkdir -p $buildtools_configs
-rm -f $buildtools/configs
-ln -s $buildtools_configs $buildtools/configs
-
-# Write the gclient config if it does not already exist
-if [ ! -f $gclient_root/.gclient ]; then
-  echo "solutions = [
-      { \"name\"        : \"src/electron\",
-          \"url\"         : \"https://github.com/electron/electron\",
-          \"deps_file\"   : \"DEPS\",
-          \"managed\"     : False,
-          \"custom_deps\" : {
-          },
-          \"custom_vars\": {},
-      },
-    ]
-  " >$gclient_root/.gclient
-fi
-
-# Write the default buildtools config file if it does
-# not already exist
-if [ ! -f $buildtools/configs/evm.testing.json ]; then
-  write_config() {
-    echo "
-        {
-            \"root\": \"/workspaces/gclient\",
-            \"goma\": \"$1\",
-            \"gen\": {
-                \"args\": [
-                    \"import(\\\"//electron/build/args/testing.gn\\\")\",
-                    \"import(\\\"/home/builduser/.electron_build_tools/third_party/goma.gn\\\")\"
-                ],
-                \"out\": \"Testing\"
-            },
-            \"env\": {
-                \"CHROMIUM_BUILDTOOLS_PATH\": \"/workspaces/gclient/src/buildtools\",
-                \"GIT_CACHE_PATH\": \"/workspaces/gclient/.git-cache\"
-            },
-            \"remotes\": {
-                \"electron\": {
-                    \"origin\": \"https://github.com/electron/electron.git\"
-                }
-            }
-        }
-    " >$buildtools/configs/evm.testing.json
-  }
-
-  # Start out as cache only
-  write_config cache-only
-
-  e use testing
-
-  # Attempt to auth to the goma service via codespaces tokens
-  # if it works we can use the goma cluster
-  export NOTGOMA_CODESPACES_TOKEN=$GITHUB_TOKEN
-  if e d goma_auth login; then
-    write_config cluster
-  fi
-else
-  # Even if the config file existed we still need to re-auth with the goma
-  # cluster
-  NOTGOMA_CODESPACES_TOKEN=$GITHUB_TOKEN e d goma_auth login || true
-fi

.github/CODEOWNERS

@@ -4,7 +4,7 @@
 # https://git-scm.com/docs/gitignore
 
 # Upgrades WG
-/patches/                               @electron/wg-upgrades
+/patches/                               @electron/wg-upgrades @electron/wg-security
 DEPS                                    @electron/wg-upgrades
 
 # Releases WG
@@ -16,4 +16,3 @@ DEPS                                    @electron/wg-upgrades
 /lib/browser/guest-view-manager.ts      @electron/wg-security
 /lib/browser/guest-window-proxy.ts      @electron/wg-security
 /lib/browser/rpc-server.ts              @electron/wg-security
-/lib/renderer/security-warnings.ts      @electron/wg-security

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -37,4 +37,4 @@ body:
     label: Additional Information
     description: Add any other context about the problem here.
   validations:
-    required: false
+    required: true

.github/workflows/semantic.yml

@@ -0,0 +1,20 @@
+name: "Check Semantic Commit"
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  main:
+    name: Validate PR Title
+    runs-on: ubuntu-latest
+    steps:
+      - name: semantic-pull-request
+        uses: amannn/action-semantic-pull-request@v4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          validateSingleCommit: false

.nvmrc

@@ -1 +0,0 @@
-14

BUILD.gn

@@ -313,23 +313,6 @@ action("electron_fuses") {
   args = rebase_path(outputs)
 }
 
-action("electron_generate_node_defines") {
-  script = "build/generate_node_defines.py"
-
-  inputs = [
-    "//third_party/electron_node/src/tracing/trace_event_common.h",
-    "//third_party/electron_node/src/tracing/trace_event.h",
-    "//third_party/electron_node/src/util.h",
-  ]
-
-  outputs = [
-    "$target_gen_dir/push_and_undef_node_defines.h",
-    "$target_gen_dir/pop_node_defines.h",
-  ]
-
-  args = [ rebase_path(target_gen_dir) ] + rebase_path(inputs)
-}
-
 source_set("electron_lib") {
   configs += [ "//v8:external_startup_data" ]
   configs += [ "//third_party/electron_node:node_internals" ]
@@ -341,7 +324,6 @@ source_set("electron_lib") {
 
   deps = [
     ":electron_fuses",
-    ":electron_generate_node_defines",
     ":electron_js2c",
     ":electron_version_header",
     ":resources",
@@ -353,7 +335,6 @@ source_set("electron_lib") {
     "//base/allocator:buildflags",
     "//chrome/app:command_ids",
     "//chrome/app/resources:platform_locale_settings",
-    "//components/autofill/core/common:features",
     "//components/certificate_transparency",
     "//components/language/core/browser",
     "//components/net_log",
@@ -1250,6 +1231,10 @@ if (is_mac) {
       if (!is_component_build && is_component_ffmpeg) {
         configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
       }
+
+      if (is_linux) {
+        deps += [ "//sandbox/linux:chrome_sandbox" ]
+      }
     }
   }
 
@@ -1386,11 +1371,13 @@ dist_zip("electron_dist_zip") {
   if (is_linux) {
     data_deps += [ "//sandbox/linux:chrome_sandbox" ]
   }
+  deps = data_deps
   outputs = [ "$root_build_dir/dist.zip" ]
 }
 
 dist_zip("electron_ffmpeg_zip") {
   data_deps = [ "//third_party/ffmpeg" ]
+  deps = data_deps
   outputs = [ "$root_build_dir/ffmpeg.zip" ]
 }
 
@@ -1408,6 +1395,7 @@ group("electron_chromedriver") {
 dist_zip("electron_chromedriver_zip") {
   testonly = true
   data_deps = electron_chromedriver_deps
+  deps = data_deps
   outputs = [ "$root_build_dir/chromedriver.zip" ]
 }
 
@@ -1426,6 +1414,7 @@ group("electron_mksnapshot") {
 
 dist_zip("electron_mksnapshot_zip") {
   data_deps = mksnapshot_deps
+  deps = data_deps
   outputs = [ "$root_build_dir/mksnapshot.zip" ]
 }
 
@@ -1436,6 +1425,7 @@ copy("hunspell_dictionaries") {
 
 dist_zip("hunspell_dictionaries_zip") {
   data_deps = [ ":hunspell_dictionaries" ]
+  deps = data_deps
   flatten = true
 
   outputs = [ "$root_build_dir/hunspell_dictionaries.zip" ]
@@ -1449,6 +1439,7 @@ copy("libcxx_headers") {
 
 dist_zip("libcxx_headers_zip") {
   data_deps = [ ":libcxx_headers" ]
+  deps = data_deps
   flatten = true
   flatten_relative_to = rebase_path(
           "$target_gen_dir/electron_libcxx_include/buildtools/third_party/libc++/trunk",
@@ -1464,6 +1455,7 @@ copy("libcxxabi_headers") {
 
 dist_zip("libcxxabi_headers_zip") {
   data_deps = [ ":libcxxabi_headers" ]
+  deps = data_deps
   flatten = true
   flatten_relative_to = rebase_path(
           "$target_gen_dir/electron_libcxxabi_include/buildtools/third_party/libc++abi/trunk",

DEPS

@@ -15,9 +15,9 @@ gclient_gn_args = [
 
 vars = {
   'chromium_version':
-    '96.0.4664.27',
+    '94.0.4606.81',
   'node_version':
-    'v16.9.1',
+    'v16.5.0',
   'nan_version':
     # The following commit hash of NAN is v2.14.2 with *only* changes to the
     # test suite. This should be updated to a specific tag when one becomes

ELECTRON_VERSION

@@ -1 +1 @@
-16.0.0-beta.7
+15.5.7

README.md

@@ -60,6 +60,7 @@ npm start
 - [electronjs.org/community#boilerplates](https://electronjs.org/community#boilerplates) - Sample starter apps created by the community
 - [electron/simple-samples](https://github.com/electron/simple-samples) - Small applications with ideas for taking them further
 - [electron/electron-api-demos](https://github.com/electron/electron-api-demos) - An Electron app that teaches you how to use Electron
+- [hokein/electron-sample-apps](https://github.com/hokein/electron-sample-apps) - Small demo apps for the various Electron APIs
 
 ## Programmatic usage
 

appveyor.yml

@@ -11,7 +11,7 @@
 #  - "TARGET_ARCH" Choose from {'ia32', 'x64', 'arm', 'arm64', 'mips64el'}.
 #      Is used in some publishing scripts, but does NOT affect the Electron binary.
 #      Must match 'target_cpu' passed to "GN_EXTRA_ARGS" and "NPM_CONFIG_ARCH" value.
-#  - "UPLOAD_TO_S3" Set it to '1' upload a release to the S3 bucket.
+#  - "UPLOAD_TO_STORAGE" Set it to '1' upload a release to the Azure bucket.
 #      Otherwise the release will be uploaded to the Github Releases.
 #      (The value is only checked if "ELECTRON_RELEASE" is defined.)
 #
@@ -66,6 +66,31 @@ build_script:
   - mkdir src
   - update_depot_tools.bat
   - ps: Move-Item $env:APPVEYOR_BUILD_FOLDER -Destination src\electron
+  - ps: >-
+      if (Test-Path 'env:RAW_GOMA_AUTH') {
+        $env:GOMA_OAUTH2_CONFIG_FILE = "$pwd\.goma_oauth2_config"
+        $env:RAW_GOMA_AUTH | Set-Content $env:GOMA_OAUTH2_CONFIG_FILE
+      }
+  - git clone https://github.com/electron/build-tools.git
+  - cd build-tools
+  - npm install
+  - mkdir third_party
+  - ps: >-
+      node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
+  - ps: $env:GN_GOMA_FILE = node -e "console.log(require('./src/utils/goma.js').gnFilePath)"
+  - ps: $env:LOCAL_GOMA_DIR = node -e "console.log(require('./src/utils/goma.js').dir)"
+  - cd ..
+  - ps: .\src\electron\script\start-goma.ps1 -gomaDir $env:LOCAL_GOMA_DIR
+  - ps: >-
+      if (Test-Path 'env:RAW_GOMA_AUTH') {
+        $goma_login = python $env:LOCAL_GOMA_DIR\goma_auth.py info
+        if ($goma_login -eq 'Login as Fermi Planck') {
+          Write-warning "Goma authentication is correct";
+        } else {
+          Write-warning "WARNING!!!!!! Goma authentication is incorrect; please update Goma auth token.";
+          $host.SetShouldExit(1)
+        }
+      }
   - ps: $env:CHROMIUM_BUILDTOOLS_PATH="$pwd\src\buildtools"
   - ps: >-
       if ($env:GN_CONFIG -ne 'release') {
@@ -112,7 +137,7 @@ build_script:
           }
         }
       }
-  - if "%RUN_GCLIENT_SYNC%"=="true" ( gclient sync )
+  - if "%RUN_GCLIENT_SYNC%"=="true" ( gclient sync --with_branch_heads --with_tags --ignore_locks)
   - ps: >-
       if ($env:SAVE_GCLIENT_SRC -eq 'true') {
         # archive current source for future use 
@@ -129,21 +154,6 @@ build_script:
           Write-warning "Failed to add third_party\angle\.git; continuing anyway"
         }
       }
-  - ps: >-
-      if (Test-Path 'env:RAW_GOMA_AUTH') {
-        $env:GOMA_OAUTH2_CONFIG_FILE = "$pwd\.goma_oauth2_config"
-        $env:RAW_GOMA_AUTH | Set-Content $env:GOMA_OAUTH2_CONFIG_FILE
-      }
-  - git clone https://github.com/electron/build-tools.git
-  - cd build-tools
-  - npm install
-  - mkdir third_party
-  - ps: >-
-      node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
-  - ps: $env:GN_GOMA_FILE = node -e "console.log(require('./src/utils/goma.js').gnFilePath)"
-  - ps: $env:LOCAL_GOMA_DIR = node -e "console.log(require('./src/utils/goma.js').dir)"
-  - cd ..
-  - ps: .\src\electron\script\start-goma.ps1 -gomaDir $env:LOCAL_GOMA_DIR
   - cd src
   - set BUILD_CONFIG_PATH=//electron/build/args/%GN_CONFIG%.gn 
   - gn gen out/Default "--args=import(\"%BUILD_CONFIG_PATH%\") import(\"%GN_GOMA_FILE%\") %GN_EXTRA_ARGS% "
@@ -221,9 +231,9 @@ deploy_script:
   - cd electron
   - ps: >-
       if (Test-Path Env:\ELECTRON_RELEASE) {
-        if (Test-Path Env:\UPLOAD_TO_S3) {
-          Write-Output "Uploading Electron release distribution to s3"
-          & python script\release\uploaders\upload.py --verbose --upload_to_s3
+        if (Test-Path Env:\UPLOAD_TO_STORAGE) {
+          Write-Output "Uploading Electron release distribution to azure"
+          & python script\release\uploaders\upload.py --verbose --upload_to_storage
         } else {
           Write-Output "Uploading Electron release distribution to github releases"
           & python script\release\uploaders\upload.py --verbose

build/args/all.gn

@@ -2,7 +2,7 @@ is_electron_build = true
 root_extra_deps = [ "//electron" ]
 
 # Registry of NMVs --> https://github.com/nodejs/node/blob/master/doc/abi_version_registry.json
-node_module_version = 99
+node_module_version = 98
 
 v8_promise_internal_field_count = 1
 v8_typed_array_max_size_in_heap = 0
@@ -16,6 +16,9 @@ proprietary_codecs = true
 ffmpeg_branding = "Chrome"
 
 enable_basic_printing = true
+
+# Removes DLLs from the build, which are only meant to be used for Chromium development.
+# See https://github.com/electron/electron/pull/17985
 angle_enable_vulkan_validation_layers = false
 dawn_enable_vulkan_validation_layers = false
 

build/generate_node_defines.py

@@ -1,34 +0,0 @@
-import os
-import re
-import sys
-
-DEFINE_EXTRACT_REGEX = re.compile('^ *# *define (\w*)', re.MULTILINE)
-
-def main(outDir, headers):
-  defines = []
-  for filename in headers:
-    with open(filename, 'r') as f:
-      content = f.read()
-      defines += read_defines(content)
-
-  push_and_undef = ''
-  for define in defines:
-    push_and_undef += '#pragma push_macro("%s")\n' % define
-    push_and_undef += '#undef %s\n' % define
-  with open(os.path.join(outDir, 'push_and_undef_node_defines.h'), 'w') as o:
-    o.write(push_and_undef)
-
-  pop = ''
-  for define in defines:
-    pop += '#pragma pop_macro("%s")\n' % define
-  with open(os.path.join(outDir, 'pop_node_defines.h'), 'w') as o:
-    o.write(pop)
-
-def read_defines(content):
-  defines = []
-  for match in DEFINE_EXTRACT_REGEX.finditer(content):
-    defines.append(match.group(1))
-  return defines
-
-if __name__ == '__main__':
-  main(sys.argv[1], sys.argv[2:])

build/npm.gni

@@ -5,8 +5,8 @@ template("npm_action") {
 
   action("npm_pre_flight_" + target_name) {
     inputs = [
-      "//electron/package.json",
-      "//electron/yarn.lock",
+      "package.json",
+      "yarn.lock",
     ]
     script = "//electron/build/npm-run.py"
 

build/profile_toolchain.py

@@ -1,9 +1,12 @@
-from __future__ import with_statement
+from __future__ import unicode_literals
+
 import contextlib
 import sys
 import os
 import optparse
 import json
+import re
+import subprocess
 
 sys.path.append("%s/../../build" % os.path.dirname(os.path.realpath(__file__)))
 
@@ -33,36 +36,56 @@ def calculate_hash(root):
         return CalculateHash('.', None)
 
 def windows_installed_software():
-    import win32com.client
-    strComputer = "."
-    objWMIService = win32com.client.Dispatch("WbemScripting.SWbemLocator")
-    objSWbemServices = objWMIService.ConnectServer(strComputer, "root\cimv2")
-    colItems = objSWbemServices.ExecQuery("Select * from Win32_Product")
-    items = []
+    powershell_command = [
+        "Get-CimInstance",
+        "-Namespace",
+        "root\cimv2",
+        "-Class",
+        "Win32_product",
+        "|",
+        "Select",
+        "vendor,",
+        "description,",
+        "@{l='install_location';e='InstallLocation'},",
+        "@{l='install_date';e='InstallDate'},",
+        "@{l='install_date_2';e='InstallDate2'},",
+        "caption,",
+        "version,",
+        "name,",
+        "@{l='sku_number';e='SKUNumber'}",
+        "|",
+        "ConvertTo-Json",
+    ]
 
-    for objItem in colItems:
-        item = {}
-        if objItem.Caption:
-            item['caption'] = objItem.Caption
-        if objItem.Caption:
-            item['description'] = objItem.Description
-        if objItem.InstallDate:
-            item['install_date'] = objItem.InstallDate
-        if objItem.InstallDate2:
-            item['install_date_2'] = objItem.InstallDate2
-        if objItem.InstallLocation:
-            item['install_location'] = objItem.InstallLocation
-        if objItem.Name:
-            item['name'] = objItem.Name
-        if objItem.SKUNumber:
-            item['sku_number'] = objItem.SKUNumber
-        if objItem.Vendor:
-            item['vendor'] = objItem.Vendor
-        if objItem.Version:
-            item['version'] = objItem.Version
-        items.append(item)
+    proc = subprocess.Popen(
+        ["powershell.exe", "-Command", "-"],
+        stdin=subprocess.PIPE,
+        stdout=subprocess.PIPE,
+    )
 
-    return items
+    stdout, _ = proc.communicate(" ".join(powershell_command).encode("utf-8"))
+
+    if proc.returncode != 0:
+        raise RuntimeError("Failed to get list of installed software")
+
+    # On AppVeyor there's other output related to PSReadline,
+    # so grab only the JSON output and ignore everything else
+    json_match = re.match(
+        r".*(\[.*{.*}.*\]).*", stdout.decode("utf-8"), re.DOTALL
+    )
+
+    if not json_match:
+        raise RuntimeError(
+            "Couldn't find JSON output for list of installed software"
+        )
+
+    # Filter out missing keys
+    return list(
+        map(
+            lambda info: {k: info[k] for k in info if info[k]},
+            json.loads(json_match.group(1)),
+        )
+    )
 
 
 def windows_profile():
@@ -89,7 +112,7 @@ def windows_profile():
 
 def main(options):
     if sys.platform == 'win32':
-        with open(options.output_json, 'wb') as f:
+        with open(options.output_json, 'w') as f:
             json.dump(windows_profile(), f)
     else:
         raise OSError("Unsupported OS")

build/webpack/webpack.gni

@@ -36,7 +36,7 @@ template("webpack_build") {
           rebase_path("$target_gen_dir/buildflags/buildflags.h"),
       "--env.mode=" + mode,
     ]
-    deps += [ "//electron/buildflags" ]
+    deps += [ "buildflags" ]
 
     outputs = [ invoker.out_file ]
   }

chromium_src/BUILD.gn

@@ -15,8 +15,6 @@ static_library("chrome") {
   sources = [
     "//chrome/browser/accessibility/accessibility_ui.cc",
     "//chrome/browser/accessibility/accessibility_ui.h",
-    "//chrome/browser/app_mode/app_mode_utils.cc",
-    "//chrome/browser/app_mode/app_mode_utils.h",
     "//chrome/browser/browser_process.cc",
     "//chrome/browser/browser_process.h",
     "//chrome/browser/devtools/devtools_contents_resizing_strategy.cc",
@@ -27,7 +25,6 @@ static_library("chrome") {
     "//chrome/browser/devtools/devtools_eye_dropper.h",
     "//chrome/browser/devtools/devtools_file_system_indexer.cc",
     "//chrome/browser/devtools/devtools_file_system_indexer.h",
-    "//chrome/browser/devtools/devtools_settings.h",
     "//chrome/browser/extensions/global_shortcut_listener.cc",
     "//chrome/browser/extensions/global_shortcut_listener.h",
     "//chrome/browser/icon_loader.cc",
@@ -50,23 +47,6 @@ static_library("chrome") {
     "//chrome/browser/predictors/proxy_lookup_client_impl.h",
     "//chrome/browser/predictors/resolve_host_client_impl.cc",
     "//chrome/browser/predictors/resolve_host_client_impl.h",
-    "//chrome/browser/process_singleton.h",
-    "//chrome/browser/ui/browser_dialogs.cc",
-    "//chrome/browser/ui/browser_dialogs.h",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_bubble_type.cc",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_bubble_type.h",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_controller_base.h",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_manager.cc",
-    "//chrome/browser/ui/exclusive_access/exclusive_access_manager.h",
-    "//chrome/browser/ui/exclusive_access/fullscreen_controller.cc",
-    "//chrome/browser/ui/exclusive_access/fullscreen_controller.h",
-    "//chrome/browser/ui/exclusive_access/fullscreen_within_tab_helper.cc",
-    "//chrome/browser/ui/exclusive_access/fullscreen_within_tab_helper.h",
-    "//chrome/browser/ui/exclusive_access/keyboard_lock_controller.cc",
-    "//chrome/browser/ui/exclusive_access/keyboard_lock_controller.h",
-    "//chrome/browser/ui/exclusive_access/mouse_lock_controller.cc",
-    "//chrome/browser/ui/exclusive_access/mouse_lock_controller.h",
     "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.cc",
     "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.h",
     "//chrome/browser/ui/views/eye_dropper/eye_dropper.cc",
@@ -77,10 +57,6 @@ static_library("chrome") {
     "//extensions/browser/app_window/size_constraints.h",
   ]
 
-  if (is_posix) {
-    sources += [ "//chrome/browser/process_singleton_posix.cc" ]
-  }
-
   if (is_mac) {
     sources += [
       "//chrome/browser/extensions/global_shortcut_listener_mac.h",
@@ -89,7 +65,6 @@ static_library("chrome") {
       "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.h",
       "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.mm",
       "//chrome/browser/media/webrtc/window_icon_util_mac.mm",
-      "//chrome/browser/process_singleton_mac.mm",
       "//chrome/browser/ui/views/eye_dropper/eye_dropper_view_mac.h",
       "//chrome/browser/ui/views/eye_dropper/eye_dropper_view_mac.mm",
     ]
@@ -101,7 +76,6 @@ static_library("chrome") {
       "//chrome/browser/extensions/global_shortcut_listener_win.h",
       "//chrome/browser/icon_loader_win.cc",
       "//chrome/browser/media/webrtc/window_icon_util_win.cc",
-      "//chrome/browser/process_singleton_win.cc",
       "//chrome/browser/ui/frame/window_frame_util.h",
       "//chrome/browser/ui/view_ids.h",
       "//chrome/browser/win/chrome_process_finder.cc",
@@ -113,7 +87,7 @@ static_library("chrome") {
   }
 
   if (is_linux) {
-    sources += [ "//chrome/browser/media/webrtc/window_icon_util_ozone.cc" ]
+    sources += [ "//chrome/browser/media/webrtc/window_icon_util_linux.cc" ]
   }
 
   if (use_aura) {
@@ -130,13 +104,13 @@ static_library("chrome") {
     "//components/keyed_service/content",
     "//components/paint_preview/buildflags",
     "//components/proxy_config",
-    "//components/services/language_detection/public/mojom",
     "//content/public/browser",
     "//services/strings",
   ]
 
   deps = [
     "//chrome/browser:resource_prefetch_predictor_proto",
+    "//chrome/services/speech:buildflags",
     "//components/optimization_guide/proto:optimization_guide_proto",
   ]
 
@@ -146,6 +120,16 @@ static_library("chrome") {
 
   if (is_linux) {
     sources += [ "//chrome/browser/icon_loader_auralinux.cc" ]
+    if (use_x11 || use_ozone) {
+      sources +=
+          [ "//chrome/browser/extensions/global_shortcut_listener_linux.cc" ]
+    }
+    if (use_x11) {
+      sources += [
+        "//chrome/browser/extensions/global_shortcut_listener_x11.cc",
+        "//chrome/browser/extensions/global_shortcut_listener_x11.h",
+      ]
+    }
     if (use_ozone) {
       deps += [ "//ui/ozone" ]
       sources += [
@@ -175,7 +159,6 @@ static_library("chrome") {
 
   if (enable_desktop_capturer) {
     sources += [
-      "//chrome/browser/media/webrtc/desktop_media_list.cc",
       "//chrome/browser/media/webrtc/desktop_media_list.h",
       "//chrome/browser/media/webrtc/desktop_media_list_base.cc",
       "//chrome/browser/media/webrtc/desktop_media_list_base.h",
@@ -213,13 +196,6 @@ static_library("chrome") {
       "//chrome/browser/printing/printing_service.h",
     ]
 
-    if (enable_oop_printing) {
-      sources += [
-        "//chrome/browser/printing/print_backend_service_manager.cc",
-        "//chrome/browser/printing/print_backend_service_manager.h",
-      ]
-    }
-
     public_deps += [
       "//chrome/services/printing:lib",
       "//components/printing/browser",
@@ -227,7 +203,6 @@ static_library("chrome") {
       "//components/services/print_compositor",
       "//components/services/print_compositor/public/cpp",
       "//components/services/print_compositor/public/mojom",
-      "//printing/backend",
     ]
 
     deps += [

chromium_src/chrome/browser/process_singleton.h

@@ -0,0 +1,185 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_PROCESS_SINGLETON_H_
+#define CHROME_BROWSER_PROCESS_SINGLETON_H_
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif  // defined(OS_WIN)
+
+#include "base/callback.h"
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/process/process.h"
+#include "base/sequence_checker.h"
+#include "ui/gfx/native_widget_types.h"
+
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+#include "base/files/scoped_temp_dir.h"
+#endif
+
+#if defined(OS_WIN)
+#include "base/win/message_window.h"
+#endif  // defined(OS_WIN)
+
+namespace base {
+class CommandLine;
+}
+
+// ProcessSingleton ----------------------------------------------------------
+//
+// This class allows different browser processes to communicate with
+// each other.  It is named according to the user data directory, so
+// we can be sure that no more than one copy of the application can be
+// running at once with a given data directory.
+//
+// Implementation notes:
+// - the Windows implementation uses an invisible global message window;
+// - the Linux implementation uses a Unix domain socket in the user data dir.
+
+class ProcessSingleton {
+ public:
+  enum NotifyResult {
+    PROCESS_NONE,
+    PROCESS_NOTIFIED,
+    PROFILE_IN_USE,
+    LOCK_ERROR,
+  };
+
+  // Implement this callback to handle notifications from other processes. The
+  // callback will receive the command line and directory with which the other
+  // Chrome process was launched. Return true if the command line will be
+  // handled within the current browser instance or false if the remote process
+  // should handle it (i.e., because the current process is shutting down).
+  using NotificationCallback = base::RepeatingCallback<bool(
+      const base::CommandLine::StringVector& command_line,
+      const base::FilePath& current_directory)>;
+
+  ProcessSingleton(const base::FilePath& user_data_dir,
+                   const NotificationCallback& notification_callback);
+  ~ProcessSingleton();
+
+  // Notify another process, if available. Otherwise sets ourselves as the
+  // singleton instance. Returns PROCESS_NONE if we became the singleton
+  // instance. Callers are guaranteed to either have notified an existing
+  // process or have grabbed the singleton (unless the profile is locked by an
+  // unreachable process).
+  // TODO(brettw): Make the implementation of this method non-platform-specific
+  // by making Linux re-use the Windows implementation.
+  NotifyResult NotifyOtherProcessOrCreate();
+  void StartListeningOnSocket();
+  void OnBrowserReady();
+
+  // Sets ourself up as the singleton instance.  Returns true on success.  If
+  // false is returned, we are not the singleton instance and the caller must
+  // exit.
+  // NOTE: Most callers should generally prefer NotifyOtherProcessOrCreate() to
+  // this method, only callers for whom failure is preferred to notifying
+  // another process should call this directly.
+  bool Create();
+
+  // Clear any lock state during shutdown.
+  void Cleanup();
+
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+  static void DisablePromptForTesting();
+#endif
+#if defined(OS_WIN)
+  // Called to query whether to kill a hung browser process that has visible
+  // windows. Return true to allow killing the hung process.
+  using ShouldKillRemoteProcessCallback = base::RepeatingCallback<bool()>;
+  void OverrideShouldKillRemoteProcessCallbackForTesting(
+      const ShouldKillRemoteProcessCallback& display_dialog_callback);
+#endif
+
+ protected:
+  // Notify another process, if available.
+  // Returns true if another process was found and notified, false if we should
+  // continue with the current process.
+  // On Windows, Create() has to be called before this.
+  NotifyResult NotifyOtherProcess();
+
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+  // Exposed for testing.  We use a timeout on Linux, and in tests we want
+  // this timeout to be short.
+  NotifyResult NotifyOtherProcessWithTimeout(
+      const base::CommandLine& command_line,
+      int retry_attempts,
+      const base::TimeDelta& timeout,
+      bool kill_unresponsive);
+  NotifyResult NotifyOtherProcessWithTimeoutOrCreate(
+      const base::CommandLine& command_line,
+      int retry_attempts,
+      const base::TimeDelta& timeout);
+  void OverrideCurrentPidForTesting(base::ProcessId pid);
+  void OverrideKillCallbackForTesting(
+      const base::RepeatingCallback<void(int)>& callback);
+#endif
+
+ private:
+  NotificationCallback notification_callback_;  // Handler for notifications.
+
+#if defined(OS_WIN)
+  HWND remote_window_ = nullptr;     // The HWND_MESSAGE of another browser.
+  base::win::MessageWindow window_;  // The message-only window.
+  bool is_virtualized_ =
+      false;  // Stuck inside Microsoft Softricity VM environment.
+  HANDLE lock_file_ = INVALID_HANDLE_VALUE;
+  base::FilePath user_data_dir_;
+  ShouldKillRemoteProcessCallback should_kill_remote_process_callback_;
+#elif defined(OS_POSIX) && !defined(OS_ANDROID)
+  // Start listening to the socket.
+  void StartListening(int sock);
+
+  // Return true if the given pid is one of our child processes.
+  // Assumes that the current pid is the root of all pids of the current
+  // instance.
+  bool IsSameChromeInstance(pid_t pid);
+
+  // Extract the process's pid from a symbol link path and if it is on
+  // the same host, kill the process, unlink the lock file and return true.
+  // If the process is part of the same chrome instance, unlink the lock file
+  // and return true without killing it.
+  // If the process is on a different host, return false.
+  bool KillProcessByLockPath();
+
+  // Default function to kill a process, overridable by tests.
+  void KillProcess(int pid);
+
+  // Allow overriding for tests.
+  base::ProcessId current_pid_;
+
+  // Function to call when the other process is hung and needs to be killed.
+  // Allows overriding for tests.
+  base::RepeatingCallback<void(int)> kill_callback_;
+
+  // Path in file system to the socket.
+  base::FilePath socket_path_;
+
+  // Path in file system to the lock.
+  base::FilePath lock_path_;
+
+  // Path in file system to the cookie file.
+  base::FilePath cookie_path_;
+
+  // Temporary directory to hold the socket.
+  base::ScopedTempDir socket_dir_;
+
+  // Helper class for linux specific messages.  LinuxWatcher is ref counted
+  // because it posts messages between threads.
+  class LinuxWatcher;
+  scoped_refptr<LinuxWatcher> watcher_;
+  int sock_ = -1;
+  bool listen_on_ready_ = false;
+#endif
+
+  SEQUENCE_CHECKER(sequence_checker_);
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessSingleton);
+};
+
+#endif  // CHROME_BROWSER_PROCESS_SINGLETON_H_

chromium_src/chrome/browser/process_singleton_win.cc

@@ -0,0 +1,315 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/process_singleton.h"
+
+#include <windows.h>
+#include <shellapi.h>
+
+#include "base/base_paths.h"
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/process/process.h"
+#include "base/process/process_info.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
+#include "base/win/registry.h"
+#include "base/win/scoped_handle.h"
+#include "base/win/windows_version.h"
+#include "chrome/browser/win/chrome_process_finder.h"
+#include "content/public/common/result_codes.h"
+#include "net/base/escape.h"
+#include "ui/gfx/win/hwnd_util.h"
+
+namespace {
+
+const char kLockfile[] = "lockfile";
+
+// A helper class that acquires the given |mutex| while the AutoLockMutex is in
+// scope.
+class AutoLockMutex {
+ public:
+  explicit AutoLockMutex(HANDLE mutex) : mutex_(mutex) {
+    DWORD result = ::WaitForSingleObject(mutex_, INFINITE);
+    DPCHECK(result == WAIT_OBJECT_0) << "Result = " << result;
+  }
+
+  ~AutoLockMutex() {
+    BOOL released = ::ReleaseMutex(mutex_);
+    DPCHECK(released);
+  }
+
+ private:
+  HANDLE mutex_;
+  DISALLOW_COPY_AND_ASSIGN(AutoLockMutex);
+};
+
+// A helper class that releases the given |mutex| while the AutoUnlockMutex is
+// in scope and immediately re-acquires it when going out of scope.
+class AutoUnlockMutex {
+ public:
+  explicit AutoUnlockMutex(HANDLE mutex) : mutex_(mutex) {
+    BOOL released = ::ReleaseMutex(mutex_);
+    DPCHECK(released);
+  }
+
+  ~AutoUnlockMutex() {
+    DWORD result = ::WaitForSingleObject(mutex_, INFINITE);
+    DPCHECK(result == WAIT_OBJECT_0) << "Result = " << result;
+  }
+
+ private:
+  HANDLE mutex_;
+  DISALLOW_COPY_AND_ASSIGN(AutoUnlockMutex);
+};
+
+// Checks the visibility of the enumerated window and signals once a visible
+// window has been found.
+BOOL CALLBACK BrowserWindowEnumeration(HWND window, LPARAM param) {
+  bool* result = reinterpret_cast<bool*>(param);
+  *result = ::IsWindowVisible(window) != 0;
+  // Stops enumeration if a visible window has been found.
+  return !*result;
+}
+
+bool ParseCommandLine(const COPYDATASTRUCT* cds,
+                      base::CommandLine::StringVector* parsed_command_line,
+                      base::FilePath* current_directory) {
+  // We should have enough room for the shortest command (min_message_size)
+  // and also be a multiple of wchar_t bytes. The shortest command
+  // possible is L"START\0\0" (empty current directory and command line).
+  static const int min_message_size = 7;
+  if (cds->cbData < min_message_size * sizeof(wchar_t) ||
+      cds->cbData % sizeof(wchar_t) != 0) {
+    LOG(WARNING) << "Invalid WM_COPYDATA, length = " << cds->cbData;
+    return false;
+  }
+
+  // We split the string into 4 parts on NULLs.
+  DCHECK(cds->lpData);
+  const std::wstring msg(static_cast<wchar_t*>(cds->lpData),
+                         cds->cbData / sizeof(wchar_t));
+  const std::wstring::size_type first_null = msg.find_first_of(L'\0');
+  if (first_null == 0 || first_null == std::wstring::npos) {
+    // no NULL byte, don't know what to do
+    LOG(WARNING) << "Invalid WM_COPYDATA, length = " << msg.length()
+                 << ", first null = " << first_null;
+    return false;
+  }
+
+  // Decode the command, which is everything until the first NULL.
+  if (msg.substr(0, first_null) == L"START") {
+    // Another instance is starting parse the command line & do what it would
+    // have done.
+    VLOG(1) << "Handling STARTUP request from another process";
+    const std::wstring::size_type second_null =
+        msg.find_first_of(L'\0', first_null + 1);
+    if (second_null == std::wstring::npos || first_null == msg.length() - 1 ||
+        second_null == msg.length()) {
+      LOG(WARNING) << "Invalid format for start command, we need a string in 4 "
+                      "parts separated by NULLs";
+      return false;
+    }
+
+    // Get current directory.
+    *current_directory =
+        base::FilePath(msg.substr(first_null + 1, second_null - first_null));
+
+    const std::wstring::size_type third_null =
+        msg.find_first_of(L'\0', second_null + 1);
+    if (third_null == std::wstring::npos || third_null == msg.length()) {
+      LOG(WARNING) << "Invalid format for start command, we need a string in 4 "
+                      "parts separated by NULLs";
+    }
+
+    // Get command line.
+    const std::wstring cmd_line =
+        msg.substr(second_null + 1, third_null - second_null);
+    *parsed_command_line = base::CommandLine::FromString(cmd_line).argv();
+    return true;
+  }
+  return false;
+}
+
+bool ProcessLaunchNotification(
+    const ProcessSingleton::NotificationCallback& notification_callback,
+    UINT message,
+    WPARAM wparam,
+    LPARAM lparam,
+    LRESULT* result) {
+  if (message != WM_COPYDATA)
+    return false;
+
+  // Handle the WM_COPYDATA message from another process.
+  const COPYDATASTRUCT* cds = reinterpret_cast<COPYDATASTRUCT*>(lparam);
+
+  base::CommandLine::StringVector parsed_command_line;
+  base::FilePath current_directory;
+  if (!ParseCommandLine(cds, &parsed_command_line, &current_directory)) {
+    *result = TRUE;
+    return true;
+  }
+
+  *result = notification_callback.Run(parsed_command_line, current_directory)
+                ? TRUE
+                : FALSE;
+  return true;
+}
+
+bool TerminateAppWithError() {
+  // TODO: This is called when the secondary process can't ping the primary
+  // process. Need to find out what to do here.
+  return false;
+}
+
+}  // namespace
+
+ProcessSingleton::ProcessSingleton(
+    const base::FilePath& user_data_dir,
+    const NotificationCallback& notification_callback)
+    : notification_callback_(notification_callback),
+      user_data_dir_(user_data_dir),
+      should_kill_remote_process_callback_(
+          base::BindRepeating(&TerminateAppWithError)) {
+  // The user_data_dir may have not been created yet.
+  base::CreateDirectoryAndGetError(user_data_dir, nullptr);
+}
+
+ProcessSingleton::~ProcessSingleton() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+  if (lock_file_ != INVALID_HANDLE_VALUE)
+    ::CloseHandle(lock_file_);
+}
+
+// Code roughly based on Mozilla.
+ProcessSingleton::NotifyResult ProcessSingleton::NotifyOtherProcess() {
+  if (is_virtualized_)
+    return PROCESS_NOTIFIED;  // We already spawned the process in this case.
+  if (lock_file_ == INVALID_HANDLE_VALUE && !remote_window_) {
+    return LOCK_ERROR;
+  } else if (!remote_window_) {
+    return PROCESS_NONE;
+  }
+
+  switch (chrome::AttemptToNotifyRunningChrome(remote_window_)) {
+    case chrome::NOTIFY_SUCCESS:
+      return PROCESS_NOTIFIED;
+    case chrome::NOTIFY_FAILED:
+      remote_window_ = NULL;
+      return PROCESS_NONE;
+    case chrome::NOTIFY_WINDOW_HUNG:
+      // Fall through and potentially terminate the hung browser.
+      break;
+  }
+
+  DWORD process_id = 0;
+  DWORD thread_id = ::GetWindowThreadProcessId(remote_window_, &process_id);
+  if (!thread_id || !process_id) {
+    remote_window_ = NULL;
+    return PROCESS_NONE;
+  }
+  base::Process process = base::Process::Open(process_id);
+
+  // The window is hung. Scan for every window to find a visible one.
+  bool visible_window = false;
+  ::EnumThreadWindows(thread_id, &BrowserWindowEnumeration,
+                      reinterpret_cast<LPARAM>(&visible_window));
+
+  // If there is a visible browser window, ask the user before killing it.
+  if (visible_window && !should_kill_remote_process_callback_.Run()) {
+    // The user denied. Quit silently.
+    return PROCESS_NOTIFIED;
+  }
+
+  // Time to take action. Kill the browser process.
+  process.Terminate(content::RESULT_CODE_HUNG, true);
+  remote_window_ = NULL;
+  return PROCESS_NONE;
+}
+
+ProcessSingleton::NotifyResult ProcessSingleton::NotifyOtherProcessOrCreate() {
+  ProcessSingleton::NotifyResult result = PROCESS_NONE;
+  if (!Create()) {
+    result = NotifyOtherProcess();
+    if (result == PROCESS_NONE)
+      result = PROFILE_IN_USE;
+  }
+  return result;
+}
+
+void ProcessSingleton::StartListeningOnSocket() {}
+void ProcessSingleton::OnBrowserReady() {}
+
+// Look for a Chrome instance that uses the same profile directory. If there
+// isn't one, create a message window with its title set to the profile
+// directory path.
+bool ProcessSingleton::Create() {
+  static const wchar_t kMutexName[] = L"Local\\AtomProcessSingletonStartup!";
+
+  remote_window_ = chrome::FindRunningChromeWindow(user_data_dir_);
+  if (!remote_window_) {
+    // Make sure we will be the one and only process creating the window.
+    // We use a named Mutex since we are protecting against multi-process
+    // access. As documented, it's clearer to NOT request ownership on creation
+    // since it isn't guaranteed we will get it. It is better to create it
+    // without ownership and explicitly get the ownership afterward.
+    base::win::ScopedHandle only_me(::CreateMutex(NULL, FALSE, kMutexName));
+    if (!only_me.IsValid()) {
+      DPLOG(FATAL) << "CreateMutex failed";
+      return false;
+    }
+
+    AutoLockMutex auto_lock_only_me(only_me.Get());
+
+    // We now own the mutex so we are the only process that can create the
+    // window at this time, but we must still check if someone created it
+    // between the time where we looked for it above and the time the mutex
+    // was given to us.
+    remote_window_ = chrome::FindRunningChromeWindow(user_data_dir_);
+    if (!remote_window_) {
+      // We have to make sure there is no Chrome instance running on another
+      // machine that uses the same profile.
+      base::FilePath lock_file_path = user_data_dir_.AppendASCII(kLockfile);
+      lock_file_ =
+          ::CreateFile(lock_file_path.value().c_str(), GENERIC_WRITE,
+                       FILE_SHARE_READ, NULL, CREATE_ALWAYS,
+                       FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE, NULL);
+      DWORD error = ::GetLastError();
+      LOG_IF(WARNING, lock_file_ != INVALID_HANDLE_VALUE &&
+                          error == ERROR_ALREADY_EXISTS)
+          << "Lock file exists but is writable.";
+      LOG_IF(ERROR, lock_file_ == INVALID_HANDLE_VALUE)
+          << "Lock file can not be created! Error code: " << error;
+
+      if (lock_file_ != INVALID_HANDLE_VALUE) {
+        // Set the window's title to the path of our user data directory so
+        // other Chrome instances can decide if they should forward to us.
+        bool result =
+            window_.CreateNamed(base::BindRepeating(&ProcessLaunchNotification,
+                                                    notification_callback_),
+                                user_data_dir_.value());
+
+        // NB: Ensure that if the primary app gets started as elevated
+        // admin inadvertently, secondary windows running not as elevated
+        // will still be able to send messages
+        ::ChangeWindowMessageFilterEx(window_.hwnd(), WM_COPYDATA, MSGFLT_ALLOW,
+                                      NULL);
+        CHECK(result && window_.hwnd());
+      }
+    }
+  }
+
+  return window_.hwnd() != NULL;
+}
+
+void ProcessSingleton::Cleanup() {}
+
+void ProcessSingleton::OverrideShouldKillRemoteProcessCallbackForTesting(
+    const ShouldKillRemoteProcessCallback& display_dialog_callback) {
+  should_kill_remote_process_callback_ = display_dialog_callback;
+}

chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc

@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "shell/browser/ui/views/global_menu_bar_registrar_x11.h"
-
-#include <string>
+#include "chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h"
 
 #include "base/bind.h"
 #include "base/debug/leak_annotations.h"
@@ -51,7 +49,7 @@ GlobalMenuBarRegistrarX11::GlobalMenuBarRegistrarX11() {
                                    G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START),
       nullptr, kAppMenuRegistrarName, kAppMenuRegistrarPath,
       kAppMenuRegistrarName,
-      nullptr,  // Probably want a real cancelable.
+      nullptr,  // TODO: Probalby want a real cancelable.
       static_cast<GAsyncReadyCallback>(OnProxyCreatedThunk), this);
 }
 

chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SHELL_BROWSER_UI_VIEWS_GLOBAL_MENU_BAR_REGISTRAR_X11_H_
-#define SHELL_BROWSER_UI_VIEWS_GLOBAL_MENU_BAR_REGISTRAR_X11_H_
+#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_REGISTRAR_X11_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_REGISTRAR_X11_H_
 
 #include <gio/gio.h>
 
@@ -57,4 +57,4 @@ class GlobalMenuBarRegistrarX11 {
   DISALLOW_COPY_AND_ASSIGN(GlobalMenuBarRegistrarX11);
 };
 
-#endif  // SHELL_BROWSER_UI_VIEWS_GLOBAL_MENU_BAR_REGISTRAR_X11_H_
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_GLOBAL_MENU_BAR_REGISTRAR_X11_H_

docs/api/app.md

@@ -483,7 +483,6 @@ Returns:
 * `event` Event
 * `argv` String[] - An array of the second instance's command line arguments
 * `workingDirectory` String - The second instance's working directory
-* `additionalData` unknown - A JSON object of additional data passed from the second instance
 
 This event will be emitted inside the primary instance of your application
 when a second instance has been executed and calls `app.requestSingleInstanceLock()`.
@@ -942,8 +941,6 @@ app.setJumpList([
 
 ### `app.requestSingleInstanceLock()`
 
-* `additionalData` unknown (optional) - A JSON object containing additional data to send to the first instance.
-
 Returns `Boolean`
 
 The return value of this method indicates whether or not this instance of your
@@ -969,16 +966,12 @@ starts:
 const { app } = require('electron')
 let myWindow = null
 
-const additionalData = { myKey: 'myValue' }
-const gotTheLock = app.requestSingleInstanceLock(additionalData)
+const gotTheLock = app.requestSingleInstanceLock()
 
 if (!gotTheLock) {
   app.quit()
 } else {
-  app.on('second-instance', (event, commandLine, workingDirectory, additionalData) => {
-    // Print out data received from the second instance.
-    console.log(additionalData)
-
+  app.on('second-instance', (event, commandLine, workingDirectory) => {
     // Someone tried to run a second instance, we should focus our window.
     if (myWindow) {
       if (myWindow.isMinimized()) myWindow.restore()

docs/api/browser-window.md

@@ -394,6 +394,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
   * `titleBarOverlay` Object | Boolean (optional) -  When using a frameless window in conjuction with `win.setWindowButtonVisibility(true)` on macOS or using a `titleBarStyle` so that the standard window controls ("traffic lights" on macOS) are visible, this property enables the Window Controls Overlay [JavaScript APIs][overlay-javascript-apis] and [CSS Environment Variables][overlay-css-env-vars]. Specifying `true` will result in an overlay with default system colors. Default is `false`.
     * `color` String (optional) _Windows_ - The CSS color of the Window Controls Overlay when enabled. Default is the system color.
     * `symbolColor` String (optional) _Windows_ - The CSS color of the symbols on the Window Controls Overlay when enabled. Default is the system color.
+    * `height` Integer (optional) _macOS_ _Windows_ - The height of the title bar and Window Controls Overlay in pixels. Default is system height.
 
 When setting minimum or maximum window size with `minWidth`/`maxWidth`/
 `minHeight`/`maxHeight`, it only constrains the users. It won't prevent you from
@@ -999,7 +1000,7 @@ APIs like `win.setSize`.
   is `true`). Default is `#FFF` (white).
 
 Sets the background color of the window. See [Setting
-`backgroundColor`](#setting-backgroundcolor).
+`backgroundColor`](#setting-the-backgroundcolor-property).
 
 #### `win.previewFile(path[, displayName])` _macOS_
 
@@ -1044,7 +1045,7 @@ Returns [`Rectangle`](structures/rectangle.md) - The `bounds` of the window as `
 #### `win.getBackgroundColor()`
 
 Returns `String` - Gets the background color of the window. See [Setting
-`backgroundColor`](#setting-backgroundcolor).
+`backgroundColor`](#setting-the-backgroundcolor-property).
 
 #### `win.setContentBounds(bounds[, animate])`
 

docs/api/clipboard.md

@@ -76,7 +76,7 @@ Writes `markup` to the clipboard.
 ```js
 const { clipboard } = require('electron')
 
-clipboard.writeHTML('<b>Hi</b')
+clipboard.writeHTML('<b>Hi</b>')
 ```
 
 ### `clipboard.readImage([type])`
@@ -131,15 +131,15 @@ Returns `Object`:
 
 Returns an Object containing `title` and `url` keys representing the bookmark in
 the clipboard. The `title` and `url` values will be empty strings when the
-bookmark is unavailable.  The `title` value will always be empty on Windows.
+bookmark is unavailable.
 
 ### `clipboard.writeBookmark(title, url[, type])` _macOS_ _Windows_
 
-* `title` String - Unused on Windows
+* `title` String
 * `url` String
 * `type` String (optional) - Can be `selection` or `clipboard`; default is 'clipboard'. `selection` is only available on Linux.
 
-Writes the `title` (macOS only) and `url` into the clipboard as a bookmark.
+Writes the `title` and `url` into the clipboard as a bookmark.
 
 **Note:** Most apps on Windows don't support pasting bookmarks into them so
 you can use `clipboard.write` to write both a bookmark and fallback text to the

docs/api/context-bridge.md

@@ -102,8 +102,8 @@ has been included below for completeness:
 | `Boolean` | Simple | ✅ | ✅ | N/A |
 | `Object` | Complex | ✅ | ✅ | Keys must be supported using only "Simple" types in this table.  Values must be supported in this table.  Prototype modifications are dropped.  Sending custom classes will copy values but not the prototype. |
 | `Array` | Complex | ✅ | ✅ | Same limitations as the `Object` type |
-| `Error` | Complex | ✅ | ✅ | Errors that are thrown are also copied, this can result in the message and stack trace of the error changing slightly due to being thrown in a different context |
-| `Promise` | Complex | ✅ | ✅ | Promises are only proxied if they are the return value or exact parameter.  Promises nested in arrays or objects will be dropped. |
+| `Error` | Complex | ✅ | ✅ | Errors that are thrown are also copied, this can result in the message and stack trace of the error changing slightly due to being thrown in a different context, and any custom properties on the Error object [will be lost](https://github.com/electron/electron/issues/25596) |
+| `Promise` | Complex | ✅ | ✅ | N/A
 | `Function` | Complex | ✅ | ✅ | Prototype modifications are dropped.  Sending classes or constructors will not work. |
 | [Cloneable Types](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm) | Simple | ✅ | ✅ | See the linked document on cloneable types |
 | `Element` | Complex | ✅ | ✅ | Prototype modifications are dropped.  Sending custom elements will not work. |

docs/api/crash-reporter.md

@@ -19,9 +19,6 @@ following projects:
 * [socorro](https://github.com/mozilla/socorro)
 * [mini-breakpad-server](https://github.com/electron/mini-breakpad-server)
 
-> **Note:** Electron uses Crashpad, not Breakpad, to collect and upload
-> crashes, but for the time being, the [upload protocol is the same](https://chromium.googlesource.com/crashpad/crashpad/+/HEAD/doc/overview_design.md#Upload-to-collection-server).
-
 Or use a 3rd party hosted solution:
 
 * [Backtrace](https://backtrace.io/electron/)
@@ -29,12 +26,49 @@ Or use a 3rd party hosted solution:
 * [BugSplat](https://www.bugsplat.com/docs/platforms/electron)
 
 Crash reports are stored temporarily before being uploaded in a directory
-underneath the app's user data directory, called 'Crashpad'. You can override
-this directory by calling `app.setPath('crashDumps', '/path/to/crashes')`
-before starting the crash reporter.
+underneath the app's user data directory (called 'Crashpad' on Windows and Mac,
+or 'Crash Reports' on Linux). You can override this directory by calling
+`app.setPath('crashDumps', '/path/to/crashes')` before starting the crash
+reporter.
 
-Electron uses [crashpad](https://chromium.googlesource.com/crashpad/crashpad/+/refs/heads/main/README.md)
-to monitor and report crashes.
+On Windows and macOS, Electron uses
+[crashpad](https://chromium.googlesource.com/crashpad/crashpad/+/master/README.md)
+to monitor and report crashes. On Linux, Electron uses
+[breakpad](https://chromium.googlesource.com/breakpad/breakpad/+/master/). This
+is an implementation detail driven by Chromium, and it may change in future. In
+particular, crashpad is newer and will likely eventually replace breakpad on
+all platforms.
+
+### Note about Node child processes on Linux
+
+If you are using the Node.js `child_process` module and want to report crashes
+from those processes on Linux, there is an extra step you will need to take to
+properly initialize the crash reporter in the child process. This is not
+necessary on Mac or Windows, as those platforms use Crashpad, which
+automatically monitors child processes.
+
+Since `require('electron')` is not available in Node child processes, the
+following APIs are available on the `process` object in Node child processes.
+Note that, on Linux, each Node child process has its own separate instance of
+the breakpad crash reporter. This is dissimilar to renderer child processes,
+which have a "stub" breakpad reporter which returns information to the main
+process for reporting.
+
+#### `process.crashReporter.start(options)`
+
+See [`crashReporter.start()`](#crashreporterstartoptions).
+
+#### `process.crashReporter.getParameters()`
+
+See [`crashReporter.getParameters()`](#crashreportergetparameters).
+
+#### `process.crashReporter.addExtraParameter(key, value)`
+
+See [`crashReporter.addExtraParameter(key, value)`](#crashreporteraddextraparameterkey-value).
+
+#### `process.crashReporter.removeExtraParameter(key)`
+
+See [`crashReporter.removeExtraParameter(key)`](#crashreporterremoveextraparameterkey).
 
 ## Methods
 
@@ -152,6 +186,12 @@ names must be no longer than 39 bytes, and values must be no longer than 20320
 bytes. Keys with names longer than the maximum will be silently ignored. Key
 values longer than the maximum length will be truncated.
 
+**Note:** On linux values that are longer than 127 bytes will be chunked into
+multiple keys, each 127 bytes in length.  E.g. `addExtraParameter('foo', 'a'.repeat(130))`
+will result in two chunked keys `foo__1` and `foo__2`, the first will contain
+the first 127 bytes and the second will contain the remaining 3 bytes.  On
+your crash reporting backend you should stitch together keys in this format.
+
 ### `crashReporter.removeExtraParameter(key)`
 
 * `key` String - Parameter key, must be no longer than 39 bytes.
@@ -163,32 +203,6 @@ will not include this parameter.
 
 Returns `Record<String, String>` - The current 'extra' parameters of the crash reporter.
 
-## In Node child processes
-
-Since `require('electron')` is not available in Node child processes, the
-following APIs are available on the `process` object in Node child processes.
-
-#### `process.crashReporter.start(options)`
-
-See [`crashReporter.start()`](#crashreporterstartoptions).
-
-Note that if the crash reporter is started in the main process, it will
-automatically monitor child processes, so it should not be started in the child
-process. Only use this method if the main process does not initialize the crash
-reporter.
-
-#### `process.crashReporter.getParameters()`
-
-See [`crashReporter.getParameters()`](#crashreportergetparameters).
-
-#### `process.crashReporter.addExtraParameter(key, value)`
-
-See [`crashReporter.addExtraParameter(key, value)`](#crashreporteraddextraparameterkey-value).
-
-#### `process.crashReporter.removeExtraParameter(key)`
-
-See [`crashReporter.removeExtraParameter(key)`](#crashreporterremoveextraparameterkey).
-
 ## Crash Report Payload
 
 The crash reporter will send the following data to the `submitURL` as

docs/api/environment-variables.md

@@ -122,7 +122,7 @@ Prints Chromium's internal logging to the console.
 
 Setting this variable is the same as passing `--enable-logging`
 on the command line. For more info, see `--enable-logging` in [command-line
-switches](./command-line-switches.md#enable-loggingfile).
+switches](./command-line-switches.md#--enable-loggingfile).
 
 ### `ELECTRON_LOG_FILE`
 
@@ -130,7 +130,7 @@ Sets the file destination for Chromium's internal logging.
 
 Setting this variable is the same as passing `--log-file`
 on the command line. For more info, see `--log-file` in [command-line
-switches](./command-line-switches.md#log-filepath).
+switches](./command-line-switches.md#--log-filepath).
 
 ### `ELECTRON_DEBUG_DRAG_REGIONS`
 

docs/api/extensions.md

@@ -100,8 +100,6 @@ The following methods of `chrome.tabs` are supported:
 
 - `chrome.tabs.sendMessage`
 - `chrome.tabs.executeScript`
-- `chrome.tabs.update` (partial support)
-  - supported properties: `url`, `muted`.
 
 > **Note:** In Chrome, passing `-1` as a tab ID signifies the "currently active
 > tab". Since Electron has no such concept, passing `-1` as a tab ID is not

docs/api/native-theme.md

@@ -67,3 +67,8 @@ or is being instructed to show a high-contrast UI.
 
 A `Boolean` for if the OS / Chromium currently has an inverted color scheme
 or is being instructed to use an inverted color scheme.
+
+### `nativeTheme.inForcedColorsMode` _Windows_ _Readonly_
+
+A `boolean` indicating whether Chromium is in forced colors mode, controlled by system accessibility settings.
+Currently, Windows high contrast is the only system setting that triggers forced colors mode.

docs/api/process.md

@@ -178,7 +178,6 @@ Returns an object with V8 heap statistics. Note that all statistics are reported
 Returns `Object`:
 
 * `allocated` Integer - Size of all allocated objects in Kilobytes.
-* `marked` Integer - Size of all marked objects in Kilobytes.
 * `total` Integer - Total allocated space in Kilobytes.
 
 Returns an object with Blink memory information.

docs/api/safe-storage.md

@@ -18,9 +18,9 @@ The `safeStorage` module has the following methods:
 
 Returns `Boolean` - Whether encryption is available.
 
-On Linux, returns true if the secret key is
-available. On MacOS, returns true if Keychain is available.
-On Windows, returns true with no other preconditions.
+On Linux, returns true if the app has emitted the `ready` event and the secret key is available.
+On MacOS, returns true if Keychain is available.
+On Windows, returns true once the app has emitted the `ready` event.
 
 ### `safeStorage.encryptString(plainText)`
 

docs/api/session.md

@@ -562,8 +562,7 @@ the original network configuration.
     * `hostname` String
     * `certificate` [Certificate](structures/certificate.md)
     * `validatedCertificate` [Certificate](structures/certificate.md)
-    * `isIssuedByKnownRoot` Boolean - `true` if Chromium recognises the root CA as a standard root. If it isn't then it's probably the case that this certificate was generated by a MITM proxy whose root has been installed locally (for example, by a corporate proxy). This should not be trusted if the `verificationResult` is not `OK`.
-    * `verificationResult` String - `OK` if the certificate is trusted, otherwise an error like `CERT_REVOKED`.
+    * `verificationResult` String - Verification result from chromium.
     * `errorCode` Integer - Error code.
   * `callback` Function
     * `verificationResult` Integer - Value can be one of certificate error codes

docs/api/web-contents.md

@@ -736,6 +736,8 @@ first available device will be selected. `callback` should be called with
 `deviceId` to be selected, passing empty string to `callback` will
 cancel the request.
 
+If no event listener is added for this event, all bluetooth requests will be cancelled.
+
 ```javascript
 const { app, BrowserWindow } = require('electron')
 
@@ -1610,7 +1612,7 @@ app.whenReady().then(() => {
 
 * `options` Object (optional)
   * `mode` String - Opens the devtools with specified dock state, can be
-    `right`, `bottom`, `undocked`, `detach`. Defaults to last used dock state.
+    `left`, `right`, `bottom`, `undocked`, `detach`. Defaults to last used dock state.
     In `undocked` mode it's possible to dock back. In `detach` mode it's not.
   * `activate` Boolean (optional) - Whether to bring the opened devtools window
     to the foreground. The default is `true`.
@@ -1838,7 +1840,7 @@ the cursor when dragging.
 
 #### `contents.savePage(fullPath, saveType)`
 
-* `fullPath` String - The full file path.
+* `fullPath` String - The absolute file path.
 * `saveType` String - Specify the save type.
   * `HTMLOnly` - Save only the HTML of the page.
   * `HTMLComplete` - Save complete-html page.

docs/api/window-open.md

@@ -64,6 +64,9 @@ window.open('https://github.com', '_blank', 'top=500,left=200,frame=false,nodeIn
   `features` will be passed to any registered `webContents`'s
   `did-create-window` event handler in the `options` argument.
 * `frameName` follows the specification of `windowName` located in the [native documentation](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#parameters).
+* When opening `about:blank`, the child window's `WebPreferences` will be copied
+  from the parent window, and there is no way to override it because Chromium
+  skips browser side navigation in this case.
 
 To customize or cancel the creation of the window, you can optionally set an
 override handler with `webContents.setWindowOpenHandler()` from the main

docs/breaking-changes.md

@@ -12,63 +12,6 @@ This document uses the following convention to categorize breaking changes:
 * **Deprecated:** An API was marked as deprecated. The API will continue to function, but will emit a deprecation warning, and will be removed in a future release.
 * **Removed:** An API or feature was removed, and is no longer supported by Electron.
 
-## Planned Breaking API Changes (17.0)
-
-### Removed: `desktopCapturer.getSources` in the renderer
-
-The `desktopCapturer.getSources` API is now only available in the main process.
-This has been changed in order to improve the default security of Electron
-apps.
-
-If you need this functionality, it can be replaced as follows:
-
-```js
-// Main process
-const { ipcMain, desktopCapturer } = require('electron')
-
-ipcMain.handle(
-  'DESKTOP_CAPTURER_GET_SOURCES',
-  (event, opts) => desktopCapturer.getSources(opts)
-)
-```
-
-```js
-// Renderer process
-const { ipcRenderer } = require('electron')
-
-const desktopCapturer = {
-  getSources: (opts) => ipcRenderer.invoke('DESKTOP_CAPTURER_GET_SOURCES', opts)
-}
-```
-
-However, you should consider further restricting the information returned to
-the renderer; for instance, displaying a source selector to the user and only
-returning the selected source.
-
-## Planned Breaking API Changes (16.0)
-
-### Behavior Changed: `crashReporter` implementation switched to Crashpad on Linux
-
-The underlying implementation of the `crashReporter` API on Linux has changed
-from Breakpad to Crashpad, bringing it in line with Windows and Mac. As a
-result of this, child processes are now automatically monitored, and calling
-`process.crashReporter.start` in Node child processes is no longer needed (and
-is not advisable, as it will start a second instance of the Crashpad reporter).
-
-There are also some subtle changes to how annotations will be reported on
-Linux, including that long values will no longer be split between annotations
-appended with `__1`, `__2` and so on, and instead will be truncated at the
-(new, longer) annotation value limit.
-
-### Deprecated: `desktopCapturer.getSources` in the renderer
-
-Usage of the `desktopCapturer.getSources` API in the renderer has been
-deprecated and will be removed. This change improves the default security of
-Electron apps.
-
-See [here](#removed-desktopcapturergetsources-in-the-renderer) for details on
-how to replace this API in your app.
-
 ## Planned Breaking API Changes (15.0)
 
 ### Default Changed: `nativeWindowOpen` defaults to `true`

docs/development/creating-api.md

@@ -1,171 +0,0 @@
-# Creating a New Electron Browser Module
-
-Welcome to the Electron API guide! If you are unfamiliar with creating a new Electron API module within the [`browser`](https://github.com/electron/electron/tree/main/shell/browser) directory, this guide serves as a checklist for some of the necessary steps that you will need to implement.
-
-This is not a comprehensive end-all guide to creating an Electron Browser API, rather an outline documenting some of the more unintuitive steps.
-
-## Add your files to Electron's project configuration
-
-Electron uses [GN](https://gn.googlesource.com/gn) as a meta build system to generate files for its compiler, [Ninja](https://ninja-build.org/). This means that in order to tell Electron to compile your code, we have to add your API's code and header file names into [`filenames.gni`](https://github.com/electron/electron/blob/main/filenames.gni).
-
-You will need to append your API file names alphabetically into the appropriate files like so:
-
-```cpp title='filenames.gni'
-lib_sources = [
-    "path/to/api/api_name.cc",
-    "path/to/api/api_name.h",
-]
-
-lib_sources_mac = [
-    "path/to/api/api_name_mac.h",
-    "path/to/api/api_name_mac.mm",
-]
-
-lib_sources_win = [
-    "path/to/api/api_name_win.cc",
-    "path/to/api/api_name_win.h",
-]
-
-lib_sources_linux = [
-    "path/to/api/api_name_linux.cc",
-    "path/to/api/api_name_linux.h",
-]
-```
-
-Note that the Windows, macOS and Linux array additions are optional and should only be added if your API has specific platform implementations.
-
-## Create API documentation
-
-Type definitions are generated by Electron using [`@electron/docs-parser`](https://github.com/electron/docs-parser) and [`@electron/typescript-definitions`](https://github.com/electron/typescript-definitions). This step is necessary to ensure consistency across Electron's API documentation. This means that for your API type definition to appear in the `electron.d.ts` file, we must create a `.md` file. Examples can be found in [this folder](https://github.com/electron/electron/tree/main/docs/api).
-
-## Set up `ObjectTemplateBuilder` and `Wrappable`
-
-Electron constructs its modules using [`object_template_builder`](https://www.electronjs.org/blog/from-native-to-js#mateobjecttemplatebuilder).
-
-[`wrappable`](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/gin/wrappable.h) is a base class for C++ objects that have corresponding v8 wrapper objects.
-
-Here is a basic example of code that you may need to add, in order to incorporate `object_template_builder` and `wrappable` into your API. For further reference, you can find more implementations [here](https://github.com/electron/electron/tree/main/shell/browser/api).
-
-In your `api_name.h` file:
-
-```cpp title='api_name.h'
-
-#ifndef SHELL_BROWSER_API_ELECTRON_API_{API_NAME}_H_
-#define SHELL_BROWSER_API_ELECTRON_API_{API_NAME}_H_
-
-#include "gin/handle.h"
-#include "gin/wrappable.h"
-
-namespace electron {
-
-namespace api {
-
-class ApiName : public gin::Wrappable<ApiName>  {
- public:
-  static gin::Handle<ApiName> Create(v8::Isolate* isolate);
-
-  // gin::Wrappable
-  static gin::WrapperInfo kWrapperInfo;
-  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
-      v8::Isolate* isolate) override;
-  const char* GetTypeName() override;
-} // namespace api
-} // namespace electron
-```
-
-In your `api_name.cc` file:
-
-```cpp title='api_name.cc'
-#include "shell/browser/api/electron_api_safe_storage.h"
-
-#include "shell/browser/browser.h"
-#include "shell/common/gin_converters/base_converter.h"
-#include "shell/common/gin_converters/callback_converter.h"
-#include "shell/common/gin_helper/dictionary.h"
-#include "shell/common/gin_helper/object_template_builder.h"
-#include "shell/common/node_includes.h"
-#include "shell/common/platform_util.h"
-
-namespace electron {
-
-namespace api {
-
-gin::WrapperInfo ApiName::kWrapperInfo = {gin::kEmbedderNativeGin};
-
-gin::ObjectTemplateBuilder ApiName::GetObjectTemplateBuilder(
-    v8::Isolate* isolate) {
-  return gin::ObjectTemplateBuilder(isolate)
-      .SetMethod("methodName", &ApiName::methodName);
-}
-
-const char* ApiName::GetTypeName() {
-  return "ApiName";
-}
-
-// static
-gin::Handle<ApiName> ApiName::Create(v8::Isolate* isolate) {
-  return gin::CreateHandle(isolate, new ApiName());
-}
-
-} // namespace api
-
-} // namespace electron
-
-namespace {
-
-void Initialize(v8::Local<v8::Object> exports,
-                v8::Local<v8::Value> unused,
-                v8::Local<v8::Context> context,
-                void* priv) {
-  v8::Isolate* isolate = context->GetIsolate();
-  gin_helper::Dictionary dict(isolate, exports);
-  dict.Set("apiName", electron::api::ApiName::Create(isolate));
-}
-
-}  // namespace
-```
-
-## Link your Electron API with Node
-
-In the [`typings/internal-ambient.d.ts`](https://github.com/electron/electron/blob/main/typings/internal-ambient.d.ts) file, we need to append a new property onto the `Process` interface like so:
-
-```ts title='typings/internal-ambient.d.ts'
-interface Process {
-    _linkedBinding(name: 'electron_browser_{api_name}', Electron.ApiName);
-}
-```
-
-At the very bottom of your `api_name.cc` file:
-
-```cpp title='api_name.cc'
-NODE_LINKED_MODULE_CONTEXT_AWARE(electron_browser_{api_name},Initialize)
-```
-
-In your [`shell/common/node_bindings.cc`](https://github.com/electron/electron/blob/main/shell/common/node_bindings.cc) file, add your node binding name to Electron's built-in modules.
-
-```cpp title='shell/common/node_bindings.cc'
-#define ELECTRON_BUILTIN_MODULES(V)      \
-  V(electron_browser_{api_name})
-```
-
-> Note: More technical details on how Node links with Electron can be found on [our blog](https://www.electronjs.org/blog/electron-internals-using-node-as-a-library#link-node-with-electron).
-
-## Expose your API to TypeScript
-
-### Export your API as a module
-
-We will need to create a new TypeScript file in the path that follows:
-
-`"lib/browser/api/{electron_browser_{api_name}}.ts"`
-
-An example of the contents of this file can be found [here](https://github.com/electron/electron/blob/main/lib/browser/api/native-image.ts).
-
-### Expose your module to TypeScript
-
-Add your module to the module list found at `"lib/browser/api/module-list.ts"` like so:
-
-```typescript title='lib/browser/api/module-list.ts'
-export const browserModuleList: ElectronInternal.ModuleEntry[] = [
-  { name: 'apiName', loader: () => require('./api-name') },
-];
-```

docs/development/setting-up-symbol-server.md

@@ -43,8 +43,9 @@ SRV*c:\code\symbols\*https://msdl.microsoft.com/download/symbols;SRV*c:\code\sym
 
 ## Using the symbol server in Visual Studio
 
-![Tools -> Options](https://mdn.mozillademos.org/files/733/symbol-server-vc8express-menu.jpg)
-![Symbols Settings](https://mdn.mozillademos.org/files/2497/2005_options.gif)
+![Tools -> Options](../images/vs-tools-options.png)
+
+![Symbols Settings](../images/vs-options-debugging-symbols.png)
 
 ## Troubleshooting: Symbols will not load
 

docs/tutorial/application-distribution.md

@@ -56,7 +56,7 @@ will then be your distribution to deliver to users.
 
 ### With an app source code archive
 
-Instead of from shipping your app by copying all of its source files, you can
+Instead of shipping your app by copying all of its source files, you can
 package your app into an [asar] archive to improve the performance of reading
 files on platforms like Windows, if you are not already using a bundler such
 as Parcel or Webpack.

docs/tutorial/dark-mode.md

@@ -138,7 +138,7 @@ Finally, the `main.js` file represents the main process and contains the actual
 const { app, BrowserWindow, ipcMain, nativeTheme } = require('electron')
 const path = require('path')
 
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600,

docs/tutorial/electron-versioning.md

@@ -18,7 +18,7 @@ npm install --save-dev electron@latest
 
 There are several major changes from our 1.x strategy outlined below. Each change is intended to satisfy the needs and priorities of developers/maintainers and app developers.
 
-1. Strict use of the the [SemVer](#semver) spec
+1. Strict use of the [SemVer](#semver) spec
 2. Introduction of semver-compliant `-beta` tags
 3. Introduction of [conventional commit messages](https://conventionalcommits.org/)
 4. Well-defined stabilization branches

docs/tutorial/fuses.md

@@ -12,7 +12,7 @@ Fuses are the solution to this problem, at a high level they are "magic bits" in
 
 ### The easy way
 
-We've made a handy module, [`@electron/fuses`](https://npmjs.com/package/@electron/fuses), to make flipping these fuses easy.  Check out the README of that module for more details on usage and potential error cases.
+We've made a handy module `@electron/fuses` to make flipping these fuses easy.  Check out the README of that module for more details on usage and potential error cases.
 
 ```js
 require('@electron/fuses').flipFuses(

docs/tutorial/in-app-purchases.md

@@ -39,7 +39,7 @@ inAppPurchase.on('transactions-updated', (event, transactions) => {
   }
 
   // Check each transaction.
-  transactions.forEach((transaction) => {
+  transactions.forEach(function (transaction) {
     const payment = transaction.payment
 
     switch (transaction.transactionState) {

docs/tutorial/installation.md

@@ -91,7 +91,7 @@ The above configuration will download from URLs such as
 `https://npm.taobao.org/mirrors/electron/8.0.0/electron-v8.0.0-linux-x64.zip`.
 
 If your mirror serves artifacts with different checksums to the official
-Electron release you may have to set `ELECTRON_USE_REMOTE_CHECKSUMS=1` to
+Electron release you may have to set `electron_use_remote_checksums=1` to
 force Electron to use the remote `SHASUMS256.txt` file to verify the checksum
 instead of the embedded checksums.
 

docs/tutorial/keyboard-shortcuts.md

@@ -82,7 +82,7 @@ listen for the `keyup` and `keydown` [DOM events][dom-events] inside the
 renderer process using the [addEventListener() API][addEventListener-api].
 
 ```javascript fiddle='docs/fiddles/features/keyboard-shortcuts/web-apis|focus=renderer.js'
-const handleKeyPress = (event) => {
+function handleKeyPress(event) {
   // You can put code here to handle the keypress.
   document.getElementById("last-keypress").innerText = event.key;
   console.log(`You pressed ${event.key}`);

docs/tutorial/macos-dock.md

@@ -25,7 +25,7 @@ Starting with a working application from the
 ```javascript fiddle='docs/fiddles/features/macos-dock-menu'
 const { app, BrowserWindow, Menu } = require('electron')
 
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600,

docs/tutorial/message-ports.md

@@ -134,7 +134,7 @@ app.whenReady().then(async () => {
 <script>
 const { ipcRenderer } = require('electron')
 
-const doWork = (input) => {
+function doWork(input) {
   // Something cpu-intensive.
   return input * 2
 }
@@ -185,7 +185,7 @@ stream of data.
 ```js
 // renderer.js ///////////////////////////////////////////////////////////////
 
-const makeStreamingRequest = (element, callback) => {
+function makeStreamingRequest (element, callback) {
   // MessageChannels are lightweight--it's cheap to create a new one for each
   // request.
   const { port1, port2 } = new MessageChannel()

docs/tutorial/notifications.md

@@ -54,7 +54,7 @@ const { Notification } = require('electron')
 const NOTIFICATION_TITLE = 'Basic Notification'
 const NOTIFICATION_BODY = 'Notification from the Main process'
 
-const showNotification = () => {
+function showNotification () {
   new Notification({ title: NOTIFICATION_TITLE, body: NOTIFICATION_BODY }).show()
 }
 

docs/tutorial/online-offline-events.md

@@ -41,7 +41,7 @@ Starting with an HTML file `index.html`, this example will demonstrate how the `
 In order to mutate the DOM, create a `renderer.js` file that adds event listeners to the `'online'` and `'offline'` `window` events. The event handler sets the content of the `<strong id='status'>` element depending on the result of `navigator.onLine`.
 
 ```js title='renderer.js'
-const updateOnlineStatus = () => {
+function updateOnlineStatus () {
   document.getElementById('status').innerHTML = navigator.onLine ? 'online' : 'offline'
 }
 
@@ -56,7 +56,7 @@ Finally, create a `main.js` file for main process that creates the window.
 ```js title='main.js'
 const { app, BrowserWindow } = require('electron')
 
-const createWindow = () => {
+function createWindow () {
   const onlineStatusWindow = new BrowserWindow({
     width: 400,
     height: 100

docs/tutorial/process-model.md

@@ -84,7 +84,7 @@ uses `app` APIs to create a more native application window experience.
 
 ```js title='main.js'
 // quitting the app when no windows are open on non-macOS platforms
-app.on('window-all-closed', () => {
+app.on('window-all-closed', function () {
   if (process.platform !== 'darwin') app.quit()
 })
 ```

docs/tutorial/progress-bar.md

@@ -48,7 +48,7 @@ const { app, BrowserWindow } = require('electron')
 
 let progressInterval
 
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600

docs/tutorial/quick-start.md

@@ -166,7 +166,7 @@ Then, add a `createWindow()` function that loads `index.html` into a new `Browse
 instance.
 
 ```js
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600
@@ -216,7 +216,7 @@ To implement this, listen for the `app` module's [`'window-all-closed'`][window-
 event, and call [`app.quit()`][app-quit] if the user is not on macOS (`darwin`).
 
 ```js
-app.on('window-all-closed', () => {
+app.on('window-all-closed', function () {
   if (process.platform !== 'darwin') app.quit()
 })
 ```
@@ -244,7 +244,7 @@ from within your existing `whenReady()` callback.
 app.whenReady().then(() => {
   createWindow()
 
-  app.on('activate', () => {
+  app.on('activate', function () {
     if (BrowserWindow.getAllWindows().length === 0) createWindow()
   })
 })
@@ -295,7 +295,7 @@ to the `webPreferences.preload` option in your existing `BrowserWindow` construc
 const path = require('path')
 
 // modify your existing createWindow() function
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600,
@@ -360,7 +360,7 @@ The full code is available below:
 const { app, BrowserWindow } = require('electron')
 const path = require('path')
 
-const createWindow = () => {
+function createWindow () {
   // Create the browser window.
   const mainWindow = new BrowserWindow({
     width: 800,
@@ -383,7 +383,7 @@ const createWindow = () => {
 app.whenReady().then(() => {
   createWindow()
 
-  app.on('activate', () => {
+  app.on('activate', function () {
     // On macOS it's common to re-create a window in the app when the
     // dock icon is clicked and there are no other windows open.
     if (BrowserWindow.getAllWindows().length === 0) createWindow()
@@ -393,7 +393,7 @@ app.whenReady().then(() => {
 // Quit when all windows are closed, except on macOS. There, it's common
 // for applications and their menu bar to stay active until the user quits
 // explicitly with Cmd + Q.
-app.on('window-all-closed', () => {
+app.on('window-all-closed', function () {
   if (process.platform !== 'darwin') app.quit()
 })
 

docs/tutorial/recent-documents.md

@@ -22,7 +22,7 @@ const { app, BrowserWindow } = require('electron')
 const fs = require('fs')
 const path = require('path')
 
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600

docs/tutorial/represented-file.md

@@ -24,7 +24,7 @@ To set the represented file of window, you can use the
 const { app, BrowserWindow } = require('electron')
 const os = require('os');
 
-const createWindow = () => {
+function createWindow () {
   const win = new BrowserWindow({
     width: 800,
     height: 600

docs/tutorial/security.md

@@ -216,7 +216,7 @@ access to a `window.readConfig()` method, but no Node.js features.
 ```js
 const { readFileSync } = require('fs')
 
-window.readConfig = () => {
+window.readConfig = function () {
   const data = readFileSync('./config.json')
   return data
 }

docs/tutorial/support.md

@@ -70,10 +70,10 @@ until the maintainers feel the maintenance burden is too high to continue doing
 
 ### Currently supported versions
 
-* 16.x.y
 * 15.x.y
 * 14.x.y
-* 13
+* 13.x.y
+* 12
 
 ### End-of-life
 

electron_resources.grd

@@ -19,7 +19,6 @@
     <includes>
       <include name="IDR_CONTENT_SHELL_DEVTOOLS_DISCOVERY_PAGE" file="${target_gen_dir}/shell_devtools_discovery_page.html" use_base_dir="false" type="BINDATA" />
       <include name="IDR_PDF_MANIFEST" file="../chrome/browser/resources/pdf/manifest.json" type="BINDATA" />
-      <include name="IDR_CRYPTOTOKEN_MANIFEST" file="../chrome/browser/resources/cryptotoken/manifest.json" type="BINDATA" />
     </includes>
   </release>
 </grit>

filenames.auto.gni

@@ -135,14 +135,16 @@ auto_filenames = {
 
   sandbox_bundle_deps = [
     "lib/common/api/deprecate.ts",
-    "lib/common/api/native-image.ts",
     "lib/common/define-properties.ts",
     "lib/common/ipc-messages.ts",
+    "lib/common/type-utils.ts",
+    "lib/common/web-view-events.ts",
     "lib/common/web-view-methods.ts",
     "lib/renderer/api/context-bridge.ts",
     "lib/renderer/api/crash-reporter.ts",
     "lib/renderer/api/desktop-capturer.ts",
     "lib/renderer/api/ipc-renderer.ts",
+    "lib/renderer/api/native-image.ts",
     "lib/renderer/api/web-frame.ts",
     "lib/renderer/inspector.ts",
     "lib/renderer/ipc-renderer-internal-utils.ts",
@@ -167,6 +169,7 @@ auto_filenames = {
   ]
 
   isolated_bundle_deps = [
+    "lib/common/type-utils.ts",
     "lib/common/web-view-methods.ts",
     "lib/isolated_renderer/init.ts",
     "lib/renderer/web-view/web-view-attributes.ts",
@@ -203,6 +206,7 @@ auto_filenames = {
     "lib/browser/api/menu.ts",
     "lib/browser/api/message-channel.ts",
     "lib/browser/api/module-list.ts",
+    "lib/browser/api/native-image.ts",
     "lib/browser/api/native-theme.ts",
     "lib/browser/api/net-log.ts",
     "lib/browser/api/net.ts",
@@ -237,13 +241,13 @@ auto_filenames = {
     "lib/common/api/clipboard.ts",
     "lib/common/api/deprecate.ts",
     "lib/common/api/module-list.ts",
-    "lib/common/api/native-image.ts",
     "lib/common/api/shell.ts",
     "lib/common/define-properties.ts",
     "lib/common/init.ts",
     "lib/common/ipc-messages.ts",
     "lib/common/parse-features-string.ts",
     "lib/common/reset-search-paths.ts",
+    "lib/common/type-utils.ts",
     "lib/common/web-view-events.ts",
     "lib/common/web-view-methods.ts",
     "lib/common/webpack-globals-provider.ts",
@@ -260,12 +264,13 @@ auto_filenames = {
     "lib/common/api/clipboard.ts",
     "lib/common/api/deprecate.ts",
     "lib/common/api/module-list.ts",
-    "lib/common/api/native-image.ts",
     "lib/common/api/shell.ts",
     "lib/common/define-properties.ts",
     "lib/common/init.ts",
     "lib/common/ipc-messages.ts",
     "lib/common/reset-search-paths.ts",
+    "lib/common/type-utils.ts",
+    "lib/common/web-view-events.ts",
     "lib/common/web-view-methods.ts",
     "lib/common/webpack-provider.ts",
     "lib/renderer/api/context-bridge.ts",
@@ -274,6 +279,7 @@ auto_filenames = {
     "lib/renderer/api/exports/electron.ts",
     "lib/renderer/api/ipc-renderer.ts",
     "lib/renderer/api/module-list.ts",
+    "lib/renderer/api/native-image.ts",
     "lib/renderer/api/web-frame.ts",
     "lib/renderer/init.ts",
     "lib/renderer/inspector.ts",
@@ -299,12 +305,12 @@ auto_filenames = {
     "lib/common/api/clipboard.ts",
     "lib/common/api/deprecate.ts",
     "lib/common/api/module-list.ts",
-    "lib/common/api/native-image.ts",
     "lib/common/api/shell.ts",
     "lib/common/define-properties.ts",
     "lib/common/init.ts",
     "lib/common/ipc-messages.ts",
     "lib/common/reset-search-paths.ts",
+    "lib/common/type-utils.ts",
     "lib/common/webpack-provider.ts",
     "lib/renderer/api/context-bridge.ts",
     "lib/renderer/api/crash-reporter.ts",
@@ -312,6 +318,7 @@ auto_filenames = {
     "lib/renderer/api/exports/electron.ts",
     "lib/renderer/api/ipc-renderer.ts",
     "lib/renderer/api/module-list.ts",
+    "lib/renderer/api/native-image.ts",
     "lib/renderer/api/web-frame.ts",
     "lib/renderer/ipc-renderer-internal-utils.ts",
     "lib/renderer/ipc-renderer-internal.ts",

filenames.gni

@@ -44,8 +44,8 @@ filenames = {
   ]
 
   lib_sources_linux_x11 = [
-    "shell/browser/ui/views/global_menu_bar_registrar_x11.cc",
-    "shell/browser/ui/views/global_menu_bar_registrar_x11.h",
+    "chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc",
+    "chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h",
     "shell/browser/ui/views/global_menu_bar_x11.cc",
     "shell/browser/ui/views/global_menu_bar_x11.h",
     "shell/browser/ui/x/event_disabler.cc",
@@ -56,9 +56,13 @@ filenames = {
     "shell/browser/ui/x/x_window_utils.h",
   ]
 
-  lib_sources_posix = [ "shell/browser/electron_browser_main_parts_posix.cc" ]
+  lib_sources_posix = [
+    "chromium_src/chrome/browser/process_singleton_posix.cc",
+    "shell/browser/electron_browser_main_parts_posix.cc",
+  ]
 
   lib_sources_win = [
+    "chromium_src/chrome/browser/process_singleton_win.cc",
     "shell/browser/api/electron_api_power_monitor_win.cc",
     "shell/browser/api/electron_api_system_preferences_win.cc",
     "shell/browser/browser_win.cc",
@@ -233,6 +237,7 @@ filenames = {
   ]
 
   lib_sources = [
+    "chromium_src/chrome/browser/process_singleton.h",
     "shell/app/command_line_args.cc",
     "shell/app/command_line_args.h",
     "shell/app/electron_content_client.cc",
@@ -347,6 +352,8 @@ filenames = {
     "shell/browser/child_web_contents_tracker.h",
     "shell/browser/cookie_change_notifier.cc",
     "shell/browser/cookie_change_notifier.h",
+    "shell/browser/electron_api_ipc_handler_impl.cc",
+    "shell/browser/electron_api_ipc_handler_impl.h",
     "shell/browser/electron_autofill_driver.cc",
     "shell/browser/electron_autofill_driver.h",
     "shell/browser/electron_autofill_driver_factory.cc",
@@ -355,8 +362,6 @@ filenames = {
     "shell/browser/electron_browser_client.h",
     "shell/browser/electron_browser_context.cc",
     "shell/browser/electron_browser_context.h",
-    "shell/browser/electron_browser_handler_impl.cc",
-    "shell/browser/electron_browser_handler_impl.h",
     "shell/browser/electron_browser_main_parts.cc",
     "shell/browser/electron_browser_main_parts.h",
     "shell/browser/electron_download_manager_delegate.cc",
@@ -373,6 +378,8 @@ filenames = {
     "shell/browser/electron_quota_permission_context.h",
     "shell/browser/electron_speech_recognition_manager_delegate.cc",
     "shell/browser/electron_speech_recognition_manager_delegate.h",
+    "shell/browser/electron_web_contents_utility_handler_impl.cc",
+    "shell/browser/electron_web_contents_utility_handler_impl.h",
     "shell/browser/electron_web_ui_controller_factory.cc",
     "shell/browser/electron_web_ui_controller_factory.h",
     "shell/browser/event_emitter_mixin.cc",
@@ -504,6 +511,8 @@ filenames = {
     "shell/browser/web_contents_preferences.h",
     "shell/browser/web_contents_zoom_controller.cc",
     "shell/browser/web_contents_zoom_controller.h",
+    "shell/browser/web_dialog_helper.cc",
+    "shell/browser/web_dialog_helper.h",
     "shell/browser/web_view_guest_delegate.cc",
     "shell/browser/web_view_guest_delegate.h",
     "shell/browser/web_view_manager.cc",
@@ -683,8 +692,6 @@ filenames = {
   lib_sources_extensions = [
     "shell/browser/extensions/api/i18n/i18n_api.cc",
     "shell/browser/extensions/api/i18n/i18n_api.h",
-    "shell/browser/extensions/api/cryptotoken_private/cryptotoken_private_api.cc",
-    "shell/browser/extensions/api/cryptotoken_private/cryptotoken_private_api.h",
     "shell/browser/extensions/api/management/electron_management_api_delegate.cc",
     "shell/browser/extensions/api/management/electron_management_api_delegate.h",
     "shell/browser/extensions/api/resources_private/resources_private_api.cc",

lib/browser/api/menu-item-roles.ts

@@ -143,10 +143,7 @@ export const roleList: Record<RoleId, Role> = {
     label: 'Toggle Developer Tools',
     accelerator: isMac ? 'Alt+Command+I' : 'Ctrl+Shift+I',
     nonNativeMacOSRole: true,
-    webContentsMethod: wc => {
-      const bw = wc.getOwnerBrowserWindow();
-      if (bw) bw.webContents.toggleDevTools();
-    }
+    windowMethod: w => w.webContents.toggleDevTools()
   },
   togglefullscreen: {
     label: 'Toggle Full Screen',

lib/browser/api/module-list.ts

@@ -16,6 +16,7 @@ export const browserModuleList: ElectronInternal.ModuleEntry[] = [
   { name: 'Menu', loader: () => require('./menu') },
   { name: 'MenuItem', loader: () => require('./menu-item') },
   { name: 'MessageChannelMain', loader: () => require('./message-channel') },
+  { name: 'nativeImage', loader: () => require('./native-image') },
   { name: 'nativeTheme', loader: () => require('./native-theme') },
   { name: 'net', loader: () => require('./net') },
   { name: 'netLog', loader: () => require('./net-log') },

lib/browser/api/web-contents.ts

@@ -669,16 +669,6 @@ WebContents.prototype._init = function () {
         postBody
       };
       windowOpenOverriddenOptions = this._callWindowOpenHandler(event, details);
-      // if attempting to use this API with the deprecated new-window event,
-      // windowOpenOverriddenOptions will always return null. This ensures
-      // short-term backwards compatibility until new-window is removed.
-      const parsedFeatures = parseFeatures(rawFeatures);
-      const overriddenFeatures: BrowserWindowConstructorOptions = {
-        ...parsedFeatures.options,
-        webPreferences: parsedFeatures.webPreferences
-      };
-      windowOpenOverriddenOptions = windowOpenOverriddenOptions || overriddenFeatures;
-
       if (!event.defaultPrevented) {
         const secureOverrideWebPreferences = windowOpenOverriddenOptions ? {
           // Allow setting of backgroundColor as a webPreference even though
@@ -688,9 +678,19 @@ WebContents.prototype._init = function () {
           transparent: windowOpenOverriddenOptions.transparent,
           ...windowOpenOverriddenOptions.webPreferences
         } : undefined;
-        this._setNextChildWebPreferences(
-          makeWebPreferences({ embedder: event.sender, secureOverrideWebPreferences })
-        );
+        // TODO(zcbenz): The features string is parsed twice: here where it is
+        // passed to C++, and in |makeBrowserWindowOptions| later where it is
+        // not actually used since the WebContents is created here.
+        // We should be able to remove the latter once the |nativeWindowOpen|
+        // option is removed.
+        const { webPreferences: parsedWebPreferences } = parseFeatures(rawFeatures);
+        // Parameters should keep same with |makeBrowserWindowOptions|.
+        const webPreferences = makeWebPreferences({
+          embedder: event.sender,
+          insecureParsedWebPreferences: parsedWebPreferences,
+          secureOverrideWebPreferences
+        });
+        this._setNextChildWebPreferences(webPreferences);
       }
     });
 
@@ -738,6 +738,14 @@ WebContents.prototype._init = function () {
     }
   });
 
+  this.on('select-bluetooth-device', (event, devices, callback) => {
+    if (this.listenerCount('select-bluetooth-device') === 1) {
+      // Cancel it if there are no handlers
+      event.preventDefault();
+      callback('');
+    }
+  });
+
   const event = process._linkedBinding('electron_browser_event').createEmpty();
   app.emit('web-contents-created', event, this);
 

lib/browser/devtools.ts

@@ -67,7 +67,7 @@ ipcMainInternal.handle(IPC_MESSAGES.INSPECTOR_CONTEXT_MENU, function (event, ite
 
     const template = isEditMenu ? getEditMenuItems() : convertToMenuTemplate(items, resolve);
     const menu = Menu.buildFromTemplate(template);
-    const window = event.sender.getOwnerBrowserWindow()!;
+    const window = event.sender.getOwnerBrowserWindow();
 
     menu.popup({ window, callback: () => resolve() });
   });
@@ -94,7 +94,7 @@ ipcMainUtils.handleSync(IPC_MESSAGES.INSPECTOR_CONFIRM, async function (event, m
     buttons: ['OK', 'Cancel'],
     cancelId: 1
   };
-  const window = event.sender.getOwnerBrowserWindow()!;
+  const window = event.sender.getOwnerBrowserWindow();
   const { response } = await dialog.showMessageBox(window, options);
   return response === 0;
 });

lib/browser/guest-view-manager.ts

@@ -4,17 +4,17 @@ import * as ipcMainUtils from '@electron/internal/browser/ipc-main-internal-util
 import { parseWebViewWebPreferences } from '@electron/internal/common/parse-features-string';
 import { syncMethods, asyncMethods, properties } from '@electron/internal/common/web-view-methods';
 import { webViewEvents } from '@electron/internal/common/web-view-events';
+import { serialize } from '@electron/internal/common/type-utils';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 interface GuestInstance {
-  elementInstanceId: number;
+  elementInstanceId?: number;
   visibilityState?: VisibilityState;
   embedder: Electron.WebContents;
   guest: Electron.WebContents;
 }
 
 const webViewManager = process._linkedBinding('electron_browser_web_view_manager');
-const eventBinding = process._linkedBinding('electron_browser_event');
 
 const supportedWebViewEvents = Object.keys(webViewEvents);
 
@@ -28,7 +28,145 @@ function sanitizeOptionsForGuest (options: Record<string, any>) {
   return ret;
 }
 
-function makeWebPreferences (embedder: Electron.WebContents, params: Record<string, any>) {
+function makeLoadURLOptions (params: Record<string, any>) {
+  const opts: Electron.LoadURLOptions = {};
+  if (params.httpreferrer) {
+    opts.httpReferrer = params.httpreferrer;
+  }
+  if (params.useragent) {
+    opts.userAgent = params.useragent;
+  }
+  return opts;
+}
+
+// Create a new guest instance.
+const createGuest = function (embedder: Electron.WebContents, params: Record<string, any>) {
+  // eslint-disable-next-line no-undef
+  const guest = (webContents as typeof ElectronInternal.WebContents).create({
+    type: 'webview',
+    partition: params.partition,
+    embedder
+  });
+  const guestInstanceId = guest.id;
+  guestInstances.set(guestInstanceId, {
+    guest,
+    embedder
+  });
+
+  // Clear the guest from map when it is destroyed.
+  guest.once('destroyed', () => {
+    if (guestInstances.has(guestInstanceId)) {
+      detachGuest(embedder, guestInstanceId);
+    }
+  });
+
+  // Init guest web view after attached.
+  guest.once('did-attach' as any, function (this: Electron.WebContents, event: Electron.Event) {
+    const params = this.attachParams!;
+    delete this.attachParams;
+
+    const previouslyAttached = this.viewInstanceId != null;
+    this.viewInstanceId = params.instanceId;
+
+    // Only load URL and set size on first attach
+    if (previouslyAttached) {
+      return;
+    }
+
+    if (params.src) {
+      this.loadURL(params.src, params.opts);
+    }
+    embedder.emit('did-attach-webview', event, guest);
+  });
+
+  const sendToEmbedder = (channel: string, ...args: any[]) => {
+    if (!embedder.isDestroyed()) {
+      embedder._sendInternal(`${channel}-${guest.viewInstanceId}`, ...args);
+    }
+  };
+
+  // Dispatch events to embedder.
+  const fn = function (event: string) {
+    guest.on(event as any, function (_, ...args: any[]) {
+      sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT, event, ...args);
+    });
+  };
+  for (const event of supportedWebViewEvents) {
+    if (event !== 'new-window') {
+      fn(event);
+    }
+  }
+
+  guest.on('new-window', function (event, url, frameName, disposition, options, additionalFeatures, referrer) {
+    sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT, 'new-window', url,
+      frameName, disposition, sanitizeOptionsForGuest(options),
+      additionalFeatures, referrer);
+  });
+
+  // Dispatch guest's IPC messages to embedder.
+  guest.on('ipc-message-host' as any, function (event: Electron.IpcMainEvent, channel: string, args: any[]) {
+    sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_IPC_MESSAGE, {
+      frameId: [event.processId, event.frameId],
+      channel,
+      args
+    });
+  });
+
+  // Notify guest of embedder window visibility when it is ready
+  // FIXME Remove once https://github.com/electron/electron/issues/6828 is fixed
+  guest.on('dom-ready', function () {
+    const guestInstance = guestInstances.get(guestInstanceId);
+    if (guestInstance != null && guestInstance.visibilityState != null) {
+      guest._sendInternal(IPC_MESSAGES.GUEST_INSTANCE_VISIBILITY_CHANGE, guestInstance.visibilityState);
+    }
+  });
+
+  return guestInstanceId;
+};
+
+// Attach the guest to an element of embedder.
+const attachGuest = function (event: Electron.IpcMainInvokeEvent,
+  embedderFrameId: number, elementInstanceId: number, guestInstanceId: number, params: Record<string, any>) {
+  const embedder = event.sender;
+  // Destroy the old guest when attaching.
+  const key = `${embedder.id}-${elementInstanceId}`;
+  const oldGuestInstanceId = embedderElementsMap.get(key);
+  if (oldGuestInstanceId != null) {
+    // Reattachment to the same guest is just a no-op.
+    if (oldGuestInstanceId === guestInstanceId) {
+      return;
+    }
+
+    const oldGuestInstance = guestInstances.get(oldGuestInstanceId);
+    if (oldGuestInstance) {
+      oldGuestInstance.guest.detachFromOuterFrame();
+    }
+  }
+
+  const guestInstance = guestInstances.get(guestInstanceId);
+  // If this isn't a valid guest instance then do nothing.
+  if (!guestInstance) {
+    throw new Error(`Invalid guestInstanceId: ${guestInstanceId}`);
+  }
+  const { guest } = guestInstance;
+  if (guest.hostWebContents !== embedder) {
+    throw new Error(`Access denied to guestInstanceId: ${guestInstanceId}`);
+  }
+
+  const { instanceId } = params;
+
+  // If this guest is already attached to an element then remove it
+  if (guestInstance.elementInstanceId) {
+    const oldKey = `${guestInstance.embedder.id}-${guestInstance.elementInstanceId}`;
+    embedderElementsMap.delete(oldKey);
+
+    // Remove guest from embedder if moving across web views
+    if (guest.viewInstanceId !== instanceId) {
+      webViewManager.removeGuest(guestInstance.embedder, guestInstanceId);
+      guestInstance.embedder._sendInternal(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DESTROY_GUEST}-${guest.viewInstanceId}`);
+    }
+  }
+
   // parse the 'webpreferences' attribute string, if set
   // this uses the same parsing rules as window.open uses for its features
   const parsedWebPreferences =
@@ -37,6 +175,7 @@ function makeWebPreferences (embedder: Electron.WebContents, params: Record<stri
       : null;
 
   const webPreferences: Electron.WebPreferences = {
+    guestInstanceId,
     nodeIntegration: params.nodeintegration != null ? params.nodeintegration : false,
     nodeIntegrationInSubFrames: params.nodeintegrationinsubframes != null ? params.nodeintegrationinsubframes : false,
     plugins: params.plugins,
@@ -45,7 +184,6 @@ function makeWebPreferences (embedder: Electron.WebContents, params: Record<stri
     webSecurity: !params.disablewebsecurity,
     enableBlinkFeatures: params.blinkfeatures,
     disableBlinkFeatures: params.disableblinkfeatures,
-    partition: params.partition,
     ...parsedWebPreferences
   };
 
@@ -65,137 +203,31 @@ function makeWebPreferences (embedder: Electron.WebContents, params: Record<stri
   ]);
 
   // Inherit certain option values from embedder
-  const lastWebPreferences = embedder.getLastWebPreferences()!;
+  const lastWebPreferences = embedder.getLastWebPreferences();
   for (const [name, value] of inheritedWebPreferences) {
     if (lastWebPreferences[name as keyof Electron.WebPreferences] === value) {
       (webPreferences as any)[name] = value;
     }
   }
 
-  return webPreferences;
-}
-
-// Create a new guest instance.
-const createGuest = function (embedder: Electron.WebContents, embedderFrameId: number, elementInstanceId: number, params: Record<string, any>) {
-  const webPreferences = makeWebPreferences(embedder, params);
-  const event = eventBinding.createWithSender(embedder);
-
   embedder.emit('will-attach-webview', event, webPreferences, params);
   if (event.defaultPrevented) {
-    return -1;
-  }
-
-  // eslint-disable-next-line no-undef
-  const guest = (webContents as typeof ElectronInternal.WebContents).create({
-    ...webPreferences,
-    type: 'webview',
-    embedder
-  });
-
-  const guestInstanceId = guest.id;
-  guestInstances.set(guestInstanceId, {
-    elementInstanceId,
-    guest,
-    embedder
-  });
-
-  // Clear the guest from map when it is destroyed.
-  guest.once('destroyed', () => {
-    if (guestInstances.has(guestInstanceId)) {
-      detachGuest(embedder, guestInstanceId);
-    }
-  });
-
-  // Init guest web view after attached.
-  guest.once('did-attach' as any, function (this: Electron.WebContents, event: Electron.Event) {
-    const previouslyAttached = this.viewInstanceId != null;
-    this.viewInstanceId = params.instanceId;
-
-    // Only load URL and set size on first attach
-    if (previouslyAttached) {
-      return;
-    }
-
-    if (params.src) {
-      const opts: Electron.LoadURLOptions = {};
-      if (params.httpreferrer) {
-        opts.httpReferrer = params.httpreferrer;
-      }
-      if (params.useragent) {
-        opts.userAgent = params.useragent;
-      }
-      this.loadURL(params.src, opts);
-    }
-    embedder.emit('did-attach-webview', event, guest);
-  });
-
-  const sendToEmbedder = (channel: string, ...args: any[]) => {
-    if (!embedder.isDestroyed()) {
-      embedder._sendInternal(`${channel}-${guest.viewInstanceId}`, ...args);
-    }
-  };
-
-  const makeProps = (eventKey: string, args: any[]) => {
-    const props: Record<string, any> = {};
-    webViewEvents[eventKey].forEach((prop, index) => {
-      props[prop] = args[index];
-    });
-    return props;
-  };
-
-  // Dispatch events to embedder.
-  for (const event of supportedWebViewEvents) {
-    guest.on(event as any, function (_, ...args: any[]) {
-      sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT, event, makeProps(event, args));
-    });
-  }
-
-  guest.on('new-window', function (event, url, frameName, disposition, options) {
-    sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT, 'new-window', {
-      url,
-      frameName,
-      disposition,
-      options: sanitizeOptionsForGuest(options)
-    });
-  });
-
-  // Dispatch guest's IPC messages to embedder.
-  guest.on('ipc-message-host' as any, function (event: Electron.IpcMainEvent, channel: string, args: any[]) {
-    sendToEmbedder(IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT, 'ipc-message', {
-      frameId: [event.processId, event.frameId],
-      channel,
-      args
-    });
-  });
-
-  // Notify guest of embedder window visibility when it is ready
-  // FIXME Remove once https://github.com/electron/electron/issues/6828 is fixed
-  guest.on('dom-ready', function () {
-    const guestInstance = guestInstances.get(guestInstanceId);
-    if (guestInstance != null && guestInstance.visibilityState != null) {
-      guest._sendInternal(IPC_MESSAGES.GUEST_INSTANCE_VISIBILITY_CHANGE, guestInstance.visibilityState);
-    }
-  });
-
-  // Destroy the old guest when attaching.
-  const key = `${embedder.id}-${elementInstanceId}`;
-  const oldGuestInstanceId = embedderElementsMap.get(key);
-  if (oldGuestInstanceId != null) {
-    const oldGuestInstance = guestInstances.get(oldGuestInstanceId);
-    if (oldGuestInstance) {
-      oldGuestInstance.guest.detachFromOuterFrame();
-    }
+    if (guest.viewInstanceId == null) guest.viewInstanceId = instanceId;
+    guest.destroy();
+    return;
   }
 
+  guest.attachParams = { instanceId, src: params.src, opts: makeLoadURLOptions(params) };
   embedderElementsMap.set(key, guestInstanceId);
+
   guest.setEmbedder(embedder);
+  guestInstance.embedder = embedder;
+  guestInstance.elementInstanceId = elementInstanceId;
 
   watchEmbedder(embedder);
 
   webViewManager.addGuest(guestInstanceId, embedder, guest, webPreferences);
   guest.attachToIframe(embedder, embedderFrameId);
-
-  return guestInstanceId;
 };
 
 // Remove an guest-embedder relationship.
@@ -280,8 +312,16 @@ const handleMessageSync = function (channel: string, handler: (event: ElectronIn
   ipcMainUtils.handleSync(channel, makeSafeHandler(channel, handler));
 };
 
-handleMessage(IPC_MESSAGES.GUEST_VIEW_MANAGER_CREATE_AND_ATTACH_GUEST, function (event, embedderFrameId: number, elementInstanceId: number, params) {
-  return createGuest(event.sender, embedderFrameId, elementInstanceId, params);
+handleMessage(IPC_MESSAGES.GUEST_VIEW_MANAGER_CREATE_GUEST, function (event, params) {
+  return createGuest(event.sender, params);
+});
+
+handleMessage(IPC_MESSAGES.GUEST_VIEW_MANAGER_ATTACH_GUEST, function (event, embedderFrameId: number, elementInstanceId: number, guestInstanceId: number, params) {
+  try {
+    attachGuest(event, embedderFrameId, elementInstanceId, guestInstanceId, params);
+  } catch (error) {
+    console.error(`Guest attach failed: ${error}`);
+  }
 });
 
 handleMessageSync(IPC_MESSAGES.GUEST_VIEW_MANAGER_DETACH_GUEST, function (event, guestInstanceId: number) {
@@ -329,6 +369,12 @@ handleMessageSync(IPC_MESSAGES.GUEST_VIEW_MANAGER_PROPERTY_SET, function (event,
   (guest as any)[property] = val;
 });
 
+handleMessage(IPC_MESSAGES.GUEST_VIEW_MANAGER_CAPTURE_PAGE, async function (event, guestInstanceId: number, args: any[]) {
+  const guest = getGuestForWebContents(guestInstanceId, event.sender);
+
+  return serialize(await guest.capturePage(...args));
+});
+
 // Returns WebContents from its guest id hosted in given webContents.
 const getGuestForWebContents = function (guestInstanceId: number, contents: Electron.WebContents) {
   const guestInstance = guestInstances.get(guestInstanceId);

lib/browser/guest-window-manager.ts

@@ -149,7 +149,7 @@ function emitDeprecatedNewWindowEvent ({ event, embedder, guest, windowOpenArgs,
   postData?: PostData,
 }): boolean {
   const { url, frameName } = windowOpenArgs;
-  const isWebViewWithPopupsDisabled = embedder.getType() === 'webview' && embedder.getLastWebPreferences()!.disablePopups;
+  const isWebViewWithPopupsDisabled = embedder.getType() === 'webview' && embedder.getLastWebPreferences().disablePopups;
   const postBody = postData ? {
     data: postData,
     ...parseContentTypeFormat(postData)
@@ -217,6 +217,10 @@ function makeBrowserWindowOptions ({ embedder, features, overrideOptions }: {
       height: 600,
       ...parsedOptions,
       ...overrideOptions,
+      // Note that for |nativeWindowOpen: true| the WebContents is created in
+      // |api::WebContents::WebContentsCreatedWithFullParams|, with prefs
+      // parsed in the |-will-add-new-contents| event.
+      // The |webPreferences| here is only used by |nativeWindowOpen: false|.
       webPreferences: makeWebPreferences({
         embedder,
         insecureParsedWebPreferences: parsedWebPreferences,
@@ -234,7 +238,7 @@ export function makeWebPreferences ({ embedder, secureOverrideWebPreferences = {
   // have unvetted prefs, use parsedWebPreferences.
   secureOverrideWebPreferences?: BrowserWindowConstructorOptions['webPreferences'],
 }) {
-  const parentWebPreferences = embedder.getLastWebPreferences()!;
+  const parentWebPreferences = embedder.getLastWebPreferences();
   const securityWebPreferencesFromParent = (Object.keys(securityWebPreferences).reduce((map, key) => {
     if (securityWebPreferences[key] === parentWebPreferences[key as keyof Electron.WebPreferences]) {
       (map as any)[key] = parentWebPreferences[key as keyof Electron.WebPreferences];

lib/browser/guest-window-proxy.ts

@@ -28,7 +28,7 @@ const getGuestWindow = function (guestContents: WebContents) {
 };
 
 const isChildWindow = function (sender: WebContents, target: WebContents) {
-  return target.getLastWebPreferences()!.openerId === sender.id;
+  return target.getLastWebPreferences().openerId === sender.id;
 };
 
 const isRelatedWindow = function (sender: WebContents, target: WebContents) {
@@ -43,7 +43,7 @@ const isScriptableWindow = function (sender: WebContents, target: WebContents) {
 };
 
 const isNodeIntegrationEnabled = function (sender: WebContents) {
-  return sender.getLastWebPreferences()!.nodeIntegration === true;
+  return sender.getLastWebPreferences().nodeIntegration === true;
 };
 
 // Checks whether |sender| can access the |target|:
@@ -65,7 +65,7 @@ ipcMainInternal.on(
     features: string
   ) => {
     // This should only be allowed for senders that have nativeWindowOpen: false
-    const lastWebPreferences = event.sender.getLastWebPreferences()!;
+    const lastWebPreferences = event.sender.getLastWebPreferences();
     if (lastWebPreferences.nativeWindowOpen || lastWebPreferences.sandbox) {
       event.returnValue = null;
       throw new Error(

lib/browser/rpc-server.ts

@@ -4,6 +4,7 @@ import { clipboard } from 'electron/common';
 import * as fs from 'fs';
 import { ipcMainInternal } from '@electron/internal/browser/ipc-main-internal';
 import * as ipcMainUtils from '@electron/internal/browser/ipc-main-internal-utils';
+import * as typeUtils from '@electron/internal/common/type-utils';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 import type * as desktopCapturerModule from '@electron/internal/browser/desktop-capturer';
@@ -59,7 +60,7 @@ ipcMainUtils.handleSync(IPC_MESSAGES.BROWSER_CLIPBOARD_SYNC, function (event, me
     throw new Error(`Invalid method: ${method}`);
   }
 
-  return (clipboard as any)[method](...args);
+  return typeUtils.serialize((clipboard as any)[method](...typeUtils.deserialize(args)));
 });
 
 if (BUILDFLAG(ENABLE_DESKTOP_CAPTURER)) {
@@ -74,7 +75,7 @@ if (BUILDFLAG(ENABLE_DESKTOP_CAPTURER)) {
       return [];
     }
 
-    return await desktopCapturer.getSourcesImpl(event.sender, options);
+    return typeUtils.serialize(await desktopCapturer.getSourcesImpl(event.sender, options));
   });
 }
 

lib/common/api/clipboard.ts

@@ -1,14 +1,20 @@
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 import type * as ipcRendererUtilsModule from '@electron/internal/renderer/ipc-renderer-internal-utils';
+import type * as typeUtilsModule from '@electron/internal/common/type-utils';
 
 const clipboard = process._linkedBinding('electron_common_clipboard');
 
 if (process.type === 'renderer') {
   const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils') as typeof ipcRendererUtilsModule;
+  const typeUtils = require('@electron/internal/common/type-utils') as typeof typeUtilsModule;
 
-  const makeRemoteMethod = function (method: keyof Electron.Clipboard): any {
-    return (...args: any[]) => ipcRendererUtils.invokeSync(IPC_MESSAGES.BROWSER_CLIPBOARD_SYNC, method, ...args);
+  const makeRemoteMethod = function (method: keyof Electron.Clipboard) {
+    return (...args: any[]) => {
+      args = typeUtils.serialize(args);
+      const result = ipcRendererUtils.invokeSync(IPC_MESSAGES.BROWSER_CLIPBOARD_SYNC, method, ...args);
+      return typeUtils.deserialize(result);
+    };
   };
 
   if (process.platform === 'linux') {

lib/common/api/module-list.ts

@@ -1,7 +1,6 @@
 // Common modules, please sort alphabetically
 export const commonModuleList: ElectronInternal.ModuleEntry[] = [
   { name: 'clipboard', loader: () => require('./clipboard') },
-  { name: 'nativeImage', loader: () => require('./native-image') },
   { name: 'shell', loader: () => require('./shell') },
   // The internal modules, invisible unless you know their names.
   { name: 'deprecate', loader: () => require('./deprecate'), private: true }

lib/common/ipc-messages.ts

@@ -8,12 +8,16 @@ export const enum IPC_MESSAGES {
 
   GUEST_INSTANCE_VISIBILITY_CHANGE = 'GUEST_INSTANCE_VISIBILITY_CHANGE',
 
+  GUEST_VIEW_INTERNAL_DESTROY_GUEST = 'GUEST_VIEW_INTERNAL_DESTROY_GUEST',
   GUEST_VIEW_INTERNAL_DISPATCH_EVENT = 'GUEST_VIEW_INTERNAL_DISPATCH_EVENT',
+  GUEST_VIEW_INTERNAL_IPC_MESSAGE = 'GUEST_VIEW_INTERNAL_IPC_MESSAGE',
 
-  GUEST_VIEW_MANAGER_CREATE_AND_ATTACH_GUEST = 'GUEST_VIEW_MANAGER_CREATE_AND_ATTACH_GUEST',
+  GUEST_VIEW_MANAGER_CREATE_GUEST = 'GUEST_VIEW_MANAGER_CREATE_GUEST',
+  GUEST_VIEW_MANAGER_ATTACH_GUEST = 'GUEST_VIEW_MANAGER_ATTACH_GUEST',
   GUEST_VIEW_MANAGER_DETACH_GUEST = 'GUEST_VIEW_MANAGER_DETACH_GUEST',
   GUEST_VIEW_MANAGER_FOCUS_CHANGE = 'GUEST_VIEW_MANAGER_FOCUS_CHANGE',
   GUEST_VIEW_MANAGER_CALL = 'GUEST_VIEW_MANAGER_CALL',
+  GUEST_VIEW_MANAGER_CAPTURE_PAGE = 'GUEST_VIEW_MANAGER_CAPTURE_PAGE',
   GUEST_VIEW_MANAGER_PROPERTY_GET = 'GUEST_VIEW_MANAGER_PROPERTY_GET',
   GUEST_VIEW_MANAGER_PROPERTY_SET = 'GUEST_VIEW_MANAGER_PROPERTY_SET',
 

lib/common/remote/ipc-messages.ts

@@ -1,19 +0,0 @@
-export const enum IPC_MESSAGES {
-  BROWSER_REQUIRE = 'REMOTE_BROWSER_REQUIRE',
-  BROWSER_GET_BUILTIN = 'REMOTE_BROWSER_GET_BUILTIN',
-  BROWSER_GET_GLOBAL = 'REMOTE_BROWSER_GET_GLOBAL',
-  BROWSER_GET_CURRENT_WINDOW = 'REMOTE_BROWSER_GET_CURRENT_WINDOW',
-  BROWSER_GET_CURRENT_WEB_CONTENTS = 'REMOTE_BROWSER_GET_CURRENT_WEB_CONTENTS',
-  BROWSER_CONSTRUCTOR = 'REMOTE_BROWSER_CONSTRUCTOR',
-  BROWSER_FUNCTION_CALL = 'REMOTE_BROWSER_FUNCTION_CALL',
-  BROWSER_MEMBER_CONSTRUCTOR = 'REMOTE_BROWSER_MEMBER_CONSTRUCTOR',
-  BROWSER_MEMBER_CALL = 'REMOTE_BROWSER_MEMBER_CALL',
-  BROWSER_MEMBER_GET = 'REMOTE_BROWSER_MEMBER_GET',
-  BROWSER_MEMBER_SET = 'REMOTE_BROWSER_MEMBER_SET',
-  BROWSER_DEREFERENCE = 'REMOTE_BROWSER_DEREFERENCE',
-  BROWSER_CONTEXT_RELEASE = 'REMOTE_BROWSER_CONTEXT_RELEASE',
-  BROWSER_WRONG_CONTEXT_ERROR = 'REMOTE_BROWSER_WRONG_CONTEXT_ERROR',
-
-  RENDERER_CALLBACK = 'REMOTE_RENDERER_CALLBACK',
-  RENDERER_RELEASE_CALLBACK = 'REMOTE_RENDERER_RELEASE_CALLBACK',
-}

lib/common/type-utils.ts

@@ -0,0 +1,110 @@
+function getCreateNativeImage () {
+  return process._linkedBinding('electron_common_native_image').nativeImage.createEmpty;
+}
+
+export function isPromise (val: any) {
+  return (
+    val &&
+    val.then &&
+    val.then instanceof Function &&
+    val.constructor &&
+    val.constructor.reject &&
+    val.constructor.reject instanceof Function &&
+    val.constructor.resolve &&
+    val.constructor.resolve instanceof Function
+  );
+}
+
+const serializableTypes = [
+  Boolean,
+  Number,
+  String,
+  Date,
+  Error,
+  RegExp,
+  ArrayBuffer
+];
+
+// https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm#Supported_types
+export function isSerializableObject (value: any) {
+  return value === null || ArrayBuffer.isView(value) || serializableTypes.some(type => value instanceof type);
+}
+
+const objectMap = function (source: Object, mapper: (value: any) => any) {
+  const sourceEntries = Object.entries(source);
+  const targetEntries = sourceEntries.map(([key, val]) => [key, mapper(val)]);
+  return Object.fromEntries(targetEntries);
+};
+
+function serializeNativeImage (image: Electron.NativeImage) {
+  const representations = [];
+  const scaleFactors = image.getScaleFactors();
+
+  // Use Buffer when there's only one representation for better perf.
+  // This avoids compressing to/from PNG where it's not necessary to
+  // ensure uniqueness of dataURLs (since there's only one).
+  if (scaleFactors.length === 1) {
+    const scaleFactor = scaleFactors[0];
+    const size = image.getSize(scaleFactor);
+    const buffer = image.toBitmap({ scaleFactor });
+    representations.push({ scaleFactor, size, buffer });
+  } else {
+    // Construct from dataURLs to ensure that they are not lost in creation.
+    for (const scaleFactor of scaleFactors) {
+      const size = image.getSize(scaleFactor);
+      const dataURL = image.toDataURL({ scaleFactor });
+      representations.push({ scaleFactor, size, dataURL });
+    }
+  }
+  return { __ELECTRON_SERIALIZED_NativeImage__: true, representations };
+}
+
+function deserializeNativeImage (value: any, createNativeImage: typeof Electron.nativeImage['createEmpty']) {
+  const image = createNativeImage();
+
+  // Use Buffer when there's only one representation for better perf.
+  // This avoids compressing to/from PNG where it's not necessary to
+  // ensure uniqueness of dataURLs (since there's only one).
+  if (value.representations.length === 1) {
+    const { buffer, size, scaleFactor } = value.representations[0];
+    const { width, height } = size;
+    image.addRepresentation({ buffer, scaleFactor, width, height });
+  } else {
+    // Construct from dataURLs to ensure that they are not lost in creation.
+    for (const rep of value.representations) {
+      const { dataURL, size, scaleFactor } = rep;
+      const { width, height } = size;
+      image.addRepresentation({ dataURL, scaleFactor, width, height });
+    }
+  }
+
+  return image;
+}
+
+export function serialize (value: any): any {
+  if (value && value.constructor && value.constructor.name === 'NativeImage') {
+    return serializeNativeImage(value);
+  } if (Array.isArray(value)) {
+    return value.map(serialize);
+  } else if (isSerializableObject(value)) {
+    return value;
+  } else if (value instanceof Object) {
+    return objectMap(value, serialize);
+  } else {
+    return value;
+  }
+}
+
+export function deserialize (value: any, createNativeImage: typeof Electron.nativeImage['createEmpty'] = getCreateNativeImage()): any {
+  if (value && value.__ELECTRON_SERIALIZED_NativeImage__) {
+    return deserializeNativeImage(value, createNativeImage);
+  } else if (Array.isArray(value)) {
+    return value.map(value => deserialize(value, createNativeImage));
+  } else if (isSerializableObject(value)) {
+    return value;
+  } else if (value instanceof Object) {
+    return objectMap(value, value => deserialize(value, createNativeImage));
+  } else {
+    return value;
+  }
+}

lib/common/web-view-events.ts

@@ -12,6 +12,7 @@ export const webViewEvents: Record<string, readonly string[]> = {
   'devtools-opened': [],
   'devtools-closed': [],
   'devtools-focused': [],
+  'new-window': ['url', 'frameName', 'disposition', 'options'],
   'will-navigate': ['url'],
   'did-start-navigation': ['url', 'isInPlace', 'isMainFrame', 'frameProcessId', 'frameRoutingId'],
   'did-redirect-navigation': ['url', 'isInPlace', 'isMainFrame', 'frameProcessId', 'frameRoutingId'],

lib/common/web-view-methods.ts

@@ -59,7 +59,6 @@ export const properties = new Set([
 ]);
 
 export const asyncMethods = new Set([
-  'capturePage',
   'loadURL',
   'executeJavaScript',
   'insertCSS',

lib/renderer/api/desktop-capturer.ts

@@ -1,5 +1,5 @@
 import { ipcRendererInternal } from '@electron/internal/renderer/ipc-renderer-internal';
-import deprecate from '@electron/internal/common/api/deprecate';
+import { deserialize } from '@electron/internal/common/type-utils';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 const { hasSwitch } = process._linkedBinding('electron_common_command_line');
@@ -14,11 +14,6 @@ function getCurrentStack () {
   return (target as any).stack;
 }
 
-let warned = process.noDeprecation;
 export async function getSources (options: Electron.SourcesOptions) {
-  if (!warned) {
-    deprecate.log('The use of \'desktopCapturer.getSources\' in the renderer process is deprecated and will be removed. See https://www.electronjs.org/docs/breaking-changes#removed-desktopcapturergetsources-in-the-renderer for more details.');
-    warned = true;
-  }
-  return await ipcRendererInternal.invoke(IPC_MESSAGES.DESKTOP_CAPTURER_GET_SOURCES, options, getCurrentStack());
+  return deserialize(await ipcRendererInternal.invoke(IPC_MESSAGES.DESKTOP_CAPTURER_GET_SOURCES, options, getCurrentStack()));
 }

lib/renderer/api/module-list.ts

@@ -3,6 +3,7 @@ export const rendererModuleList: ElectronInternal.ModuleEntry[] = [
   { name: 'contextBridge', loader: () => require('./context-bridge') },
   { name: 'crashReporter', loader: () => require('./crash-reporter') },
   { name: 'ipcRenderer', loader: () => require('./ipc-renderer') },
+  { name: 'nativeImage', loader: () => require('./native-image') },
   { name: 'webFrame', loader: () => require('./web-frame') }
 ];
 

lib/renderer/api/native-image.ts

@@ -0,0 +1,3 @@
+const { nativeImage } = process._linkedBinding('electron_common_native_image');
+
+export default nativeImage;

lib/renderer/init.ts

@@ -78,7 +78,7 @@ const isHiddenPage = mainFrame.getWebPreference('hiddenPage');
 const usesNativeWindowOpen = mainFrame.getWebPreference('nativeWindowOpen');
 const preloadScript = mainFrame.getWebPreference('preload');
 const preloadScripts = mainFrame.getWebPreference('preloadScripts');
-const isWebView = mainFrame.getWebPreference('isWebView');
+const guestInstanceId = mainFrame.getWebPreference('guestInstanceId');
 const openerId = mainFrame.getWebPreference('openerId');
 const appPath = hasSwitch('app-path') ? getSwitchValue('app-path') : null;
 
@@ -102,14 +102,14 @@ switch (window.location.protocol) {
   default: {
     // Override default web functions.
     const { windowSetup } = require('@electron/internal/renderer/window-setup') as typeof windowSetupModule;
-    windowSetup(isWebView, openerId, isHiddenPage, usesNativeWindowOpen);
+    windowSetup(guestInstanceId, openerId, isHiddenPage, usesNativeWindowOpen);
   }
 }
 
 // Load webview tag implementation.
 if (process.isMainFrame) {
   const { webViewInit } = require('@electron/internal/renderer/web-view/web-view-init') as typeof webViewInitModule;
-  webViewInit(contextIsolation, webviewTag, isWebView);
+  webViewInit(contextIsolation, webviewTag, guestInstanceId);
 }
 
 if (nodeIntegration) {

lib/renderer/security-warnings.ts

@@ -77,8 +77,15 @@ const isLocalhost = function () {
  *
  * @returns {boolean} Is a CSP with `unsafe-eval` set?
  */
-const isUnsafeEvalEnabled = () => {
-  return webFrame._isEvalAllowed();
+const isUnsafeEvalEnabled: () => Promise<boolean> = function () {
+  return webFrame.executeJavaScript(`(${(() => {
+    try {
+      eval(window.trustedTypes.emptyScript); // eslint-disable-line no-eval
+    } catch {
+      return false;
+    }
+    return true;
+  }).toString()})()`, false);
 };
 
 const moreInformation = `\nFor more information and help, consult
@@ -167,14 +174,16 @@ const warnAboutDisabledWebSecurity = function (webPreferences?: Electron.WebPref
  * Logs a warning message about unset or insecure CSP
  */
 const warnAboutInsecureCSP = function () {
-  if (!isUnsafeEvalEnabled()) return;
+  isUnsafeEvalEnabled().then((enabled) => {
+    if (!enabled) return;
 
-  const warning = `This renderer process has either no Content Security
-  Policy set or a policy with "unsafe-eval" enabled. This exposes users of
-  this app to unnecessary security risks.\n${moreInformation}`;
+    const warning = `This renderer process has either no Content Security
+    Policy set or a policy with "unsafe-eval" enabled. This exposes users of
+    this app to unnecessary security risks.\n${moreInformation}`;
 
-  console.warn('%cElectron Security Warning (Insecure Content-Security-Policy)',
-    'font-weight: bold;', warning);
+    console.warn('%cElectron Security Warning (Insecure Content-Security-Policy)',
+      'font-weight: bold;', warning);
+  }).catch(() => {});
 };
 
 /**

lib/renderer/web-view/guest-view-internal.ts

@@ -1,32 +1,58 @@
 import { ipcRendererInternal } from '@electron/internal/renderer/ipc-renderer-internal';
 import * as ipcRendererUtils from '@electron/internal/renderer/ipc-renderer-internal-utils';
+import { webViewEvents } from '@electron/internal/common/web-view-events';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 const { mainFrame: webFrame } = process._linkedBinding('electron_renderer_web_frame');
 
 export interface GuestViewDelegate {
   dispatchEvent (eventName: string, props: Record<string, any>): void;
+  reset(): void;
 }
 
 const DEPRECATED_EVENTS: Record<string, string> = {
   'page-title-updated': 'page-title-set'
 } as const;
 
-export function registerEvents (viewInstanceId: number, delegate: GuestViewDelegate) {
-  ipcRendererInternal.on(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT}-${viewInstanceId}`, function (event, eventName, props) {
-    if (DEPRECATED_EVENTS[eventName] != null) {
-      delegate.dispatchEvent(DEPRECATED_EVENTS[eventName], props);
-    }
+const dispatchEvent = function (delegate: GuestViewDelegate, eventName: string, eventKey: string, ...args: Array<any>) {
+  if (DEPRECATED_EVENTS[eventName] != null) {
+    dispatchEvent(delegate, DEPRECATED_EVENTS[eventName], eventKey, ...args);
+  }
 
-    delegate.dispatchEvent(eventName, props);
+  const props: Record<string, any> = {};
+  webViewEvents[eventKey].forEach((prop, index) => {
+    props[prop] = args[index];
+  });
+
+  delegate.dispatchEvent(eventName, props);
+};
+
+export function registerEvents (viewInstanceId: number, delegate: GuestViewDelegate) {
+  ipcRendererInternal.on(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DESTROY_GUEST}-${viewInstanceId}`, function () {
+    delegate.reset();
+    delegate.dispatchEvent('destroyed', {});
+  });
+
+  ipcRendererInternal.on(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT}-${viewInstanceId}`, function (event, eventName, ...args) {
+    dispatchEvent(delegate, eventName, eventName, ...args);
+  });
+
+  ipcRendererInternal.on(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_IPC_MESSAGE}-${viewInstanceId}`, function (event, data) {
+    delegate.dispatchEvent('ipc-message', data);
   });
 }
 
 export function deregisterEvents (viewInstanceId: number) {
+  ipcRendererInternal.removeAllListeners(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DESTROY_GUEST}-${viewInstanceId}`);
   ipcRendererInternal.removeAllListeners(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_DISPATCH_EVENT}-${viewInstanceId}`);
+  ipcRendererInternal.removeAllListeners(`${IPC_MESSAGES.GUEST_VIEW_INTERNAL_IPC_MESSAGE}-${viewInstanceId}`);
 }
 
-export function createGuest (iframe: HTMLIFrameElement, elementInstanceId: number, params: Record<string, any>): Promise<number> {
+export function createGuest (params: Record<string, any>): Promise<number> {
+  return ipcRendererInternal.invoke(IPC_MESSAGES.GUEST_VIEW_MANAGER_CREATE_GUEST, params);
+}
+
+export function attachGuest (iframe: HTMLIFrameElement, elementInstanceId: number, guestInstanceId: number, params: Record<string, any>) {
   if (!(iframe instanceof HTMLIFrameElement)) {
     throw new Error('Invalid embedder frame');
   }
@@ -36,13 +62,17 @@ export function createGuest (iframe: HTMLIFrameElement, elementInstanceId: numbe
     throw new Error('Invalid embedder frame');
   }
 
-  return ipcRendererInternal.invoke(IPC_MESSAGES.GUEST_VIEW_MANAGER_CREATE_AND_ATTACH_GUEST, embedderFrameId, elementInstanceId, params);
+  return ipcRendererInternal.invoke(IPC_MESSAGES.GUEST_VIEW_MANAGER_ATTACH_GUEST, embedderFrameId, elementInstanceId, guestInstanceId, params);
 }
 
 export function detachGuest (guestInstanceId: number) {
   return ipcRendererUtils.invokeSync(IPC_MESSAGES.GUEST_VIEW_MANAGER_DETACH_GUEST, guestInstanceId);
 }
 
+export function capturePage (guestInstanceId: number, args: any[]) {
+  return ipcRendererInternal.invoke(IPC_MESSAGES.GUEST_VIEW_MANAGER_CAPTURE_PAGE, guestInstanceId, args);
+}
+
 export function invoke (guestInstanceId: number, method: string, args: any[]) {
   return ipcRendererInternal.invoke(IPC_MESSAGES.GUEST_VIEW_MANAGER_CALL, guestInstanceId, method, args);
 }

lib/renderer/web-view/web-view-element.ts

@@ -55,7 +55,8 @@ const defineWebViewElement = (hooks: WebViewImplHooks) => {
       }
       if (!internal.elementAttached) {
         hooks.guestViewInternal.registerEvents(internal.viewInstanceId, {
-          dispatchEvent: internal.dispatchEvent.bind(internal)
+          dispatchEvent: internal.dispatchEvent.bind(internal),
+          reset: internal.reset.bind(internal)
         });
         internal.elementAttached = true;
         (internal.attributes.get(WEB_VIEW_CONSTANTS.ATTRIBUTE_SRC) as SrcAttribute).parse();

lib/renderer/web-view/web-view-impl.ts

@@ -3,6 +3,7 @@ import { WEB_VIEW_CONSTANTS } from '@electron/internal/renderer/web-view/web-vie
 import { syncMethods, asyncMethods, properties } from '@electron/internal/common/web-view-methods';
 import type { WebViewAttribute, PartitionAttribute } from '@electron/internal/renderer/web-view/web-view-attributes';
 import { setupWebViewAttributes } from '@electron/internal/renderer/web-view/web-view-attributes';
+import { deserialize } from '@electron/internal/common/type-utils';
 
 // ID generator.
 let nextId = 0;
@@ -15,6 +16,7 @@ export interface WebViewImplHooks {
   readonly guestViewInternal: typeof guestViewInternalModule;
   readonly allowGuestViewElementDefinition: NodeJS.InternalWebFrame['allowGuestViewElementDefinition'];
   readonly setIsWebView: (iframe: HTMLIFrameElement) => void;
+  readonly createNativeImage?: typeof Electron.nativeImage['createEmpty'];
 }
 
 // Represents the internal state of the WebView node.
@@ -25,7 +27,6 @@ export class WebViewImpl {
   public hasFocus = false
   public internalInstanceId?: number;
   public resizeObserver?: ResizeObserver;
-  public userAgentOverride?: string;
   public viewInstanceId: number
 
   // on* Event handlers.
@@ -113,11 +114,9 @@ export class WebViewImpl {
   }
 
   createGuest () {
-    this.internalInstanceId = getNextId();
-    this.hooks.guestViewInternal.createGuest(this.internalElement, this.internalInstanceId, this.buildParams())
-      .then(guestInstanceId => {
-        this.attachGuestInstance(guestInstanceId);
-      });
+    this.hooks.guestViewInternal.createGuest(this.buildParams()).then(guestInstanceId => {
+      this.attachGuestInstance(guestInstanceId);
+    });
   }
 
   dispatchEvent (eventName: string, props: Record<string, any> = {}) {
@@ -180,8 +179,7 @@ export class WebViewImpl {
 
   buildParams () {
     const params: Record<string, any> = {
-      instanceId: this.viewInstanceId,
-      userAgentOverride: this.userAgentOverride
+      instanceId: this.viewInstanceId
     };
 
     for (const [attributeName, attribute] of this.attributes) {
@@ -192,19 +190,20 @@ export class WebViewImpl {
   }
 
   attachGuestInstance (guestInstanceId: number) {
-    if (guestInstanceId === -1) {
-      this.dispatchEvent('destroyed');
-      return;
-    }
-
     if (!this.elementAttached) {
       // The element could be detached before we got response from browser.
-      // Destroy the backing webContents to avoid any zombie nodes in the frame tree.
-      this.hooks.guestViewInternal.detachGuest(guestInstanceId);
       return;
     }
-
+    this.internalInstanceId = getNextId();
     this.guestInstanceId = guestInstanceId;
+
+    this.hooks.guestViewInternal.attachGuest(
+      this.internalElement,
+      this.internalInstanceId,
+      this.guestInstanceId,
+      this.buildParams()
+    );
+
     // TODO(zcbenz): Should we deprecate the "resize" event? Wait, it is not
     // even documented.
     this.resizeObserver = new ResizeObserver(this.onElementResize.bind(this));
@@ -233,6 +232,10 @@ export const setupMethods = (WebViewElement: typeof ElectronInternal.WebViewElem
     };
   }
 
+  WebViewElement.prototype.capturePage = async function (...args) {
+    return deserialize(await hooks.guestViewInternal.capturePage(this.getWebContentsId(), args), hooks.createNativeImage);
+  };
+
   const createPropertyGetter = function (property: string) {
     return function (this: ElectronInternal.WebViewElement) {
       return hooks.guestViewInternal.propertyGet(this.getWebContentsId(), property);

lib/renderer/web-view/web-view-init.ts

@@ -20,9 +20,9 @@ function handleFocusBlur () {
   });
 }
 
-export function webViewInit (contextIsolation: boolean, webviewTag: boolean, isWebView: boolean) {
+export function webViewInit (contextIsolation: boolean, webviewTag: boolean, guestInstanceId: number) {
   // Don't allow recursive `<webview>`.
-  if (webviewTag && !isWebView) {
+  if (webviewTag && !guestInstanceId) {
     const guestViewInternal = require('@electron/internal/renderer/web-view/guest-view-internal') as typeof guestViewInternalModule;
     if (contextIsolation) {
       v8Util.setHiddenValue(window, 'guestViewInternal', guestViewInternal);
@@ -36,7 +36,7 @@ export function webViewInit (contextIsolation: boolean, webviewTag: boolean, isW
     }
   }
 
-  if (isWebView) {
+  if (guestInstanceId) {
     // Report focus/blur events of webview to browser.
     handleFocusBlur();
   }

lib/renderer/window-setup.ts

@@ -243,8 +243,8 @@ class BrowserWindowProxy {
 }
 
 export const windowSetup = (
-  isWebView: boolean, openerId: number, isHiddenPage: boolean, usesNativeWindowOpen: boolean) => {
-  if (!process.sandboxed && !isWebView) {
+  guestInstanceId: number, openerId: number, isHiddenPage: boolean, usesNativeWindowOpen: boolean) => {
+  if (!process.sandboxed && !guestInstanceId) {
     // Override default window.close.
     window.close = function () {
       ipcRendererInternal.send(IPC_MESSAGES.BROWSER_WINDOW_CLOSE);
@@ -318,7 +318,7 @@ export const windowSetup = (
     });
   }
 
-  if (isWebView) {
+  if (guestInstanceId) {
     // Webview `document.visibilityState` tracks window visibility (and ignores
     // the actual <webview> element visibility) for backwards compatibility.
     // See discussion in #9178.

lib/sandboxed_renderer/api/module-list.ts

@@ -13,7 +13,7 @@ export const moduleList: ElectronInternal.ModuleEntry[] = [
   },
   {
     name: 'nativeImage',
-    loader: () => require('@electron/internal/common/api/native-image')
+    loader: () => require('@electron/internal/renderer/api/native-image')
   },
   {
     name: 'webFrame',

lib/sandboxed_renderer/init.ts

@@ -131,7 +131,7 @@ const contextIsolation = mainFrame.getWebPreference('contextIsolation');
 const webviewTag = mainFrame.getWebPreference('webviewTag');
 const isHiddenPage = mainFrame.getWebPreference('hiddenPage');
 const usesNativeWindowOpen = true;
-const isWebView = mainFrame.getWebPreference('isWebView');
+const guestInstanceId = mainFrame.getWebPreference('guestInstanceId');
 const openerId = mainFrame.getWebPreference('openerId');
 
 switch (window.location.protocol) {
@@ -149,14 +149,14 @@ switch (window.location.protocol) {
   default: {
     // Override default web functions.
     const { windowSetup } = require('@electron/internal/renderer/window-setup') as typeof windowSetupModule;
-    windowSetup(isWebView, openerId, isHiddenPage, usesNativeWindowOpen);
+    windowSetup(guestInstanceId, openerId, isHiddenPage, usesNativeWindowOpen);
   }
 }
 
 // Load webview tag implementation.
 if (process.isMainFrame) {
   const { webViewInit } = require('@electron/internal/renderer/web-view/web-view-init') as typeof webViewInitModule;
-  webViewInit(contextIsolation, webviewTag, isWebView);
+  webViewInit(contextIsolation, webviewTag, guestInstanceId);
 }
 
 // Wrap the script into a function executed in global scope. It won't have

npm/install.js

@@ -22,7 +22,8 @@ if (isInstalled()) {
 const platform = process.env.npm_config_platform || process.platform;
 let arch = process.env.npm_config_arch || process.arch;
 
-if (platform === 'darwin' && process.platform === 'darwin' && arch === 'x64') {
+if (platform === 'darwin' && process.platform === 'darwin' && arch === 'x64' &&
+    process.env.npm_config_arch === undefined) {
   // When downloading for macOS ON macOS and we think we need x64 we should
   // check if we're running under rosetta and download the arm64 version if appropriate
   try {

package.json

@@ -1,9 +1,10 @@
 {
   "name": "electron",
-  "version": "16.0.0-beta.7",
+  "version": "15.5.7",
   "repository": "https://github.com/electron/electron",
   "description": "Build cross platform desktop apps with JavaScript, HTML, and CSS",
   "devDependencies": {
+    "@azure/storage-blob": "^12.9.0",
     "@electron/docs-parser": "^0.12.2",
     "@electron/typescript-definitions": "^8.9.5",
     "@octokit/auth-app": "^2.10.0",
@@ -33,7 +34,7 @@
     "asar": "^3.1.0",
     "aws-sdk": "^2.727.1",
     "check-for-leaks": "^1.2.1",
-    "colors": "^1.4.0",
+    "colors": "1.4.0",
     "dotenv-safe": "^4.0.4",
     "dugite": "^1.103.0",
     "eslint": "^7.4.0",
@@ -56,8 +57,8 @@
     "minimist": "^1.2.5",
     "null-loader": "^4.0.0",
     "pre-flight": "^1.1.0",
-    "remark-cli": "^10.0.0",
-    "remark-preset-lint-markdown-style-guide": "^4.0.0",
+    "remark-cli": "^4.0.0",
+    "remark-preset-lint-markdown-style-guide": "^2.1.1",
     "semver": "^5.6.0",
     "shx": "^0.3.2",
     "standard-markdown": "^6.0.0",