Key fixes:
- Replace `base::WeakPtrFactory` with `gin::WeakCellFactory` in
MenuMac, MenuViews, and NetLog, since weak pointers to cppgc-managed
objects must go through weak cells
- Replace `v8::Global<v8::Value>` with `cppgc::Persistent<Menu>` for
the menu reference in BaseWindow
- Stop using `gin_helper::Handle<T>` with cppgc types; use raw `T*`
and add a `static_assert` to prevent future misuse
- Add proper `Trace()` overrides for Menu, MenuMac, MenuViews, and
NetLog to ensure cppgc members are visited during garbage collection
- Replace `SelfKeepAlive` prevent-GC mechanism in Menu with a
`cppgc::Persistent` prevent-GC captured in `BindSelfToClosure`
- Introduce `GC_PLUGIN_IGNORE` macro to suppress
known-safe violations: mojo::Remote fields, ObjC bridging pointers,
and intentional persistent self-references
- Mark `ArgumentHolder` as `CPPGC_STACK_ALLOCATED()` in both Electron's
and gin's function_template.h to silence raw-pointer-to-GC-type
warnings
* chore: use emplace and use it correctly
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: redundant cast to the same type [google-readability-casting]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: do not create objects with +new [google-objc-avoid-nsobject-new]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: default arguments on virtual or override methods are prohibited [google-default-arguments]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: warning: C-style casts are discouraged; use static_cast [google-readability-casting]
CFLocaleGetValue already returns CFTypeRef so that redundant static_cast was removed
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: refactor block to avoid use after move warning from clang-tidy
Looks like clang-tidy couldn't tell these were two mutually exclusive
branches so there was no actual issue, but refactoring is cleaner
anyway since it makes it more DRY.
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: C-style casts are discouraged; use static_cast [google-readability-casting]
No cast needed here, everything is already the correct type
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: C-style casts are discouraged; use static_cast/const_cast/reinterpret_cast [google-readability-casting]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: use '= default' to define a trivial destructor [modernize-use-equals-default]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: use range-based for loop instead [modernize-loop-convert]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: redundant void argument list [modernize-redundant-void-arg]
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: address code review feedback
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: use auto
Co-authored-by: Charles Kerr <charles@charleskerr.com>
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: remove window enlargement revert patch
Chromium removed the `window_enlargement_` system from
DesktopWindowTreeHostWin (1771dbae), which was a workaround for an AMD
driver bug from 2013 (crbug.com/286609) where translucent HWNDs smaller
than 64x64 caused graphical glitches. Chromium confirmed this is no
longer needed and shipped the removal.
This removes the revert patch and all Electron-side code that depended
on the `kEnableTransparentHwndEnlargement` feature flag, including the
`GetExpandedWindowSize` helper and max size constraint expansion in
`NativeWindow::GetContentMaximumSize`.
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
* test: remove obsolete <64x64 transparent window test
The test was added in 2018 (#12904) to verify the AMD driver
workaround that artificially enlarged translucent HWNDs smaller than
64x64 (crbug.com/286609). The workaround set the real HWND to 64x64
and subtracted a stored window_enlargement_ from every client/window
bounds query, so getContentSize() reported the originally-requested
size even though the actual HWND was larger.
With both the Chromium window_enlargement_ system and Electron's
GetExpandedWindowSize gone, setContentSize on a transparent
thickFrame window calls SetWindowPos directly. WS_THICKFRAME windows
are subject to DefWindowProc's MINMAXINFO.ptMinTrackSize clamp on
programmatic resizes (Chromium's OnGetMinMaxInfo ends with
SetMsgHandled(FALSE), so DefWindowProc overwrites the zeroed
min-track with system defaults), which on Windows Server 2025
floors at 32x39 — hence the failing [32, 39] vs [30, 30].
The removed feature_list.cc comment explicitly flagged this test as
the blocker for retiring kEnableTransparentHwndEnlargement, so
delete it alongside the workaround it was validating.
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
* chore: testing of desktopCapturer can run on arm
* fix: DesktopMediaListCaptureThread crash
Fixed a crash when Windows calls ::CoCreateInstance() in the
DesktopMediaListCaptureThread before COM is initialized.
* test: added test for desktopCapturer fetchWindowIcons
* chore: updating Chromium patch hash
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Kanishk Ranjan <68316017+KanishkRanjan@users.noreply.github.com>
1. Chromium can fire unrelated permission checks (e.g. 'background-sync')
on the default session. Copy a safeguard `permission === 'fileSystem'` from
"calls twice when trying to query a read/write file handle permissions".
2. add afterEach cleanup: reset setPermissionCheckHandler(null) and
remove ipcMain listeners for 'did-create-file-handle' and
'did-create-directory-handle'.
fix: return numeric `blksize` and `blocks` from asar `fs.stat`
Previously, `fs.stat` on files inside `.asar` archives returned
`undefined` for `blksize` and `blocks`, violating the Node.js API
contract where these fields must be `number | bigint`.
Use `4096` for `blksize` (matching the convention used by `memfs` and
the proposed `node:vfs` module in nodejs/node#61478) and compute
`blocks` as `ceil(size / 512)` (standard 512-byte block units).
Fixes#42686
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: clavin <clavin@electronjs.org>
fix: pass root_gen_dir from GN to generate_node_headers.py
PR #50828 replaced a local get_out_dir() (defaulting to 'Testing') with
the shared one from script/lib/util.py (defaulting to 'Default').
Neither default is correct because the actual output directory depends
on the active build config. Pass $root_gen_dir from the GN action so
the script always uses the correct path.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
The needs-signed-commits label was previously added by the lightweight
synchronize workflow but only removed by a job in build.yml gated on
`gha-done`, which requires every macOS/Linux/Windows build to finish
green. That made label removal both slow (waits on the full pipeline)
and fragile (any unrelated build failure leaves the label pinned even
after commits are properly signed).
Drop the `if` guard on the synchronize job so it re-evaluates signing
on every push, and add a removal step that runs on success when the
label is present. Force-pushing signed commits now clears the label as
soon as the check completes, with no dependency on the build pipeline.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
fix: fix inset and stop using ToFlooredRectDeprecated()
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
#47171 migrated `std::deque` to `base::circular_deque` in
`shell/common/crash_keys.cc`. However, `CrashKeyString` wraps a
`crashpad::Annotation` that holds self-referential pointers and
registers itself in a process-global linked list. `circular_deque`
relocates elements on growth (via `VectorBuffer::MoveConstructRange`),
leaving those pointers dangling — causing missing crash keys or a hung
crashpad handler (especially on macOS). The `base/containers/README.md`
warns: "Since `base::deque` does not have stable iterators and it will
move the objects it contains, it may not be appropriate for all uses."
Reverts to `std::deque`, whose block-based layout never relocates
existing elements. Adds a regression test that registers 50 dynamic
crash keys and verifies they all survive a renderer crash.
Notes: Fixed crash keys being lost and the crash reporter hanging on
macOS when many dynamic crash keys were registered.
Made-with: Cursor
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Alexey Kozy <alexey@anysphere.co>
fix: avoid crash in window.print() when prefilling native print dialog
When UpdatePrinterSettings() fails (e.g. the printer rejects the
requested resolution), OnError() nullifies print_info_ via
ReleaseContext(). The return value was not checked, so
AskUserForSettings() passed nil to [NSPrintPanel runModalWithPrintInfo:],
crashing in PJCSessionHasApplicationSetPrinter with a null PMPrintSession.
Check the return value and fall back to UseDefaultSettings() on failure
so the dialog opens with defaults instead of crashing.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
fix: webContents.print() ignoring mediaSize when silent
PR #49523 moved the default media size fallback into OnGetDeviceNameToUse,
but the new code unconditionally writes kSettingMediaSize — clobbering
any mediaSize the caller had already set in WebContents::Print() from
options.mediaSize / pageSize. As a result, silent prints with an
explicit pageSize (e.g. "Letter") fell back to A4 with tiny content.
Only populate the default/printer media size when the caller hasn't
already supplied one, preserving the precedence:
1. user-supplied mediaSize / pageSize
2. printer default (when usePrinterDefaultPageSize is true)
3. A4 fallback
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
fix: move Electron help menu links to default app only (#50629)
* fix: remove Electron links from default help menu
* fix: remove help menu entirely from default menu
* fix: move Electron help menu links to default app
* docs: update default menu items list in menu.md
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Zeenat Lawal <zeenatlawal82@gmail.com>
Menu was holding a SelfKeepAlive to itself from construction, so any
Menu that was never opened (e.g. an application menu replaced before
being shown) stayed pinned in cppgc forever. Repeated calls to
Menu.setApplicationMenu leaked every prior Menu along with its model
and items.
Restore the original Pin/Unpin lifecycle: start keep_alive_ empty and
only assign `this` in OnMenuWillShow. OnMenuWillClose already clears
it.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
PR #50646 added a dock state allowlist in SetDockState() that collapsed any
non-matching value to "right". WebContents::OpenDevTools passes an empty
string when no `mode` option is given, which is the sentinel LoadCompleted()
uses to restore `currentDockState` from prefs. The allowlist clobbered that
sentinel to "right", so previously-undocked devtools would flash detached
and then snap back to the right dock.
Preserve the empty string through SetDockState() so the pref-restore path
runs; still reject any non-empty invalid value to keep the JS-injection
guard from #50646 intact.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
fix: resolve target bundle path once at start of install (#50745)
Resolve the Squirrel.Mac target bundle URL to a canonical path once at the
top of -[SQRLInstaller installRequest:] and use it for every step of the
install chain, rejecting requests whose path is not already canonical. When
running with elevated privileges, additionally require the target to be the
application bundle that contains the installer. SQRLUpdater now writes the
resolved bundle URL so the serialized request is canonical by construction.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <sam@electronjs.org>
Adds the ability to temporarily suspend and resume global shortcut
handling via `globalShortcut.setSuspended()` and query the current
state via `globalShortcut.isSuspended()`. When suspended, registered
shortcuts stop listening and new registrations are rejected. When
resumed, previously registered shortcuts are automatically restored.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
chore: remove unused FileSystemAccessPermissionContext::Access enum class
chore: remove unused FileSystemAccessPermissionContext::RequestType enum class
declared in 344aba08 but never used
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
chore: bump chromium to 148.0.7768.0 42-x-y
* chore: bump chromium in DEPS to 148.0.7765.0
* chore: bump chromium in DEPS to 148.0.7766.0
* fix(patch-conflict): update packed_resources dep name after upstream rename
Upstream renamed //chrome:packed_resources_integrity_header to
//chrome:packed_resources. Updated the patch to guard the new dependency
name with !is_electron_build while preserving the same intent.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7714543
* fix(patch-conflict): update code_cache_host_impl.cc for upstream includes and TODO
Upstream added #include <stdint.h> and a TODO comment in
code_cache_host_impl.cc which conflicted with the Electron code cache
custom schemes patch. Resolved by keeping both upstream additions and
the Electron ProcessLockURLIsCodeCacheScheme function.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7615151
* chore: update patch hunk headers
* 7700837: update RecordContentToVisibleTimeRequest from mojom to native struct
Upstream typemapped RecordContentToVisibleTimeRequest from a Mojo
struct to a native C++ struct. Updated OSR virtual method signatures
from blink::mojom::RecordContentToVisibleTimeRequestPtr to
std::optional<blink::RecordContentToVisibleTimeRequest> and
blink::RecordContentToVisibleTimeRequest to match.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7700837
* 7714579: update WebString::FromASCII to FromUTF8
Upstream renamed blink::WebString::FromASCII to FromAscii. Updated
Electron's usage to FromUTF8 which is equivalent for ASCII scheme
strings and avoids a dependency on the renamed method. Also fixed
blink::String::FromUTF8 to use the String constructor directly.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7714579
* 7696480: add stream_info dep after StreamInfo extraction
Upstream extracted extensions::StreamInfo from PdfViewerStreamManager
to a standalone class in extensions/browser/mime_handler/stream_info.h.
Added the new target as a dependency since Electron's streams_private
and pdf_viewer_private APIs use PdfViewerStreamManager which now
depends on the separate StreamInfo target.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7696480
* chore: bump chromium in DEPS to 148.0.7768.0
* fix(patch-conflict): update PiP patch for new toggle_mute_button in overlay window
Upstream added a toggle_mute_button to the live caption dialog controls
in VideoOverlayWindowViews::SetLiveCaptionDialogVisibility. Extended the
existing #if 0 guard to include the new button handling since Electron
disables live caption dialog functionality.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7682308
* fix(patch-conflict): update packed_resource_integrity patch after upstream dep removal
Upstream removed the deps += [ "//chrome:packed_resources" ] line from
the if (!is_win) block in chrome/browser/BUILD.gn. The Electron patch
no longer needs to guard this dep with !is_electron_build in this
location since the dep was already relocated by an earlier upstream CL.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7714543
* fix(patch-conflict): update WebSocket throttling revert for DisconnectWebSocketOnBFCache guard
Upstream added a DisconnectWebSocketOnBFCacheEnabled() runtime feature
check that wraps the WebSocket BFCache feature registration. Updated the
Electron revert patch to place the kAllowAggressiveThrottlingWithWebSocket
ternary inside the new conditional guard.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7698838
* fix(patch-conflict): update SCContentSharingPicker patch for upstream native picker refactor
Upstream added is_native_picker and filter_ based native picker session
validation to ScreenCaptureKitDeviceMac. Electron's patch uses its own
native picker approach (active_streams_ counter + direct SCContentSharingPicker
API), so marked the new upstream parameters as [[maybe_unused]] and kept
Electron's implementation.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7713560
* chore: update patch hunk headers
* 7708800: update StartDragging signature to use RenderFrameHost
Upstream refactored StartDragging to take a RenderFrameHost& instead of
separate source_origin and source_rwh parameters. Updated
OffScreenWebContentsView to match the new signature and derive the
RenderWidgetHostImpl from the RenderFrameHost internally.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7708800
* 7682308: add toggle_mute_button to chromium_src build sources
Upstream added a ToggleMuteButton to the PiP overlay window controls.
Added the new toggle_mute_button.cc/h source files to Electron's
chromium_src/BUILD.gn to resolve linker errors.
Ref: https://chromium-review.googlesource.com/c/chromium/src/+/7682308
* chore: update patches after main rebase
* fixup! 7708800: update StartDragging signature to use RenderFrameHost
fix linting
* 7705541: [trap-handler] Track individual Wasm memories | https://chromium-review.googlesource.com/c/v8/v8/+/7705541
Moved the SetUpWebAssemblyTrapHandler() call to before the V8 isolate is created
* fixup! fix utility process tests
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>
* chore: bump chromium in DEPS to 148.0.7756.0
* chore: bump chromium in DEPS to 148.0.7757.1
* chore: bump chromium in DEPS to 148.0.7759.1
* chore: bump chromium in DEPS to 148.0.7761.0
* chore: bump chromium in DEPS to 148.0.7763.1
* chore: bump chromium in DEPS to 148.0.7765.0
* chore: bump chromium in DEPS to 148.0.7765.1
* chore: bump chromium in DEPS to 148.0.7766.2
* chore: bump chromium in DEPS to 148.0.7768.1
* chore: bump chromium in DEPS to 148.0.7770.0
* chore: bump chromium in DEPS to 148.0.7772.0
* chore: bump chromium in DEPS to 148.0.7774.1
* chore: bump chromium in DEPS to 148.0.7776.1
* chore: bump chromium to 148.0.7759.0 (main) (#50515)
* chore: bump chromium in DEPS to 148.0.7755.0
* chore: bump chromium in DEPS to 148.0.7756.0
* chore: update patches
* 7698536: Wire up experiment arms for Glic summarize pdf button.
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7698536
* 7695602: Include gperf to sources for iOS builds
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7695602
* 7671200: Expose IgnoreDuplicateNavs in WebView
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7671200
* chore: bump chromium in DEPS to 148.0.7758.0
* chore: update patches
* 7701873: Allow running completion callbacks directly in CommitPresentedFrameToCA() on Mac
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7701873
* 7697732: Enhance diagnostic logging for ScreenCaptureKit errors on macOS
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7697732
* 7698176: Disallow cookies with empty name and ambiguous value
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7698176
* 7607319: Code Health: Use span in base::HexEncode
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7607319
* chore: bump chromium in DEPS to 148.0.7759.0
* chore: update patches
* 7696478: [extensions] Move StreamContainer to extensions/browser/mime_handler/
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7696478
* 7656748: Fixed controlled frame fullscreen crash
Refs https://chromium-review.googlesource.com/c/chromium/src/+/7656748
* chore: update patches
* fixup! 7696478: [extensions] Move StreamContainer to extensions/browser/mime_handler/
---------
Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
(cherry picked from commit a06b49aca1)
* chore: bump chromium to 148.0.7763.0 (main) (#50582)
(cherry picked from commit 8cd766ff53)
---------
Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>
* chore: do not expose menu.isItemCheckedAt() to JS
Not used, documented, or typed. Added in dae98fa43f.
Co-authored-by: Charles Kerr <charles@charleskerr.com>
* chore: do not expose menu.isEnabledAt() to JS
Nto used, documented, or typed. Added in dae98fa43f.
Co-authored-by: Charles Kerr <charles@charleskerr.com>
* chore: do not expose menu.isVisibleAt() to JS
Not used, documented, or typed. Added in dae98fa43f.
Co-authored-by: Charles Kerr <charles@charleskerr.com>
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
* ci: use hermetic mac SDK for the release ffmpeg build
gn gen out/ffmpeg runs as a raw gn invocation, so it never receives the
mac_sdk_path arg that e build injects for out/Default. On macOS runners
that means out/Default builds against the hermetic build-tools SDK while
out/ffmpeg falls through to the runner's system Xcode SDK. Reuse the
value e build already wrote so both builds share the same sysroot.
Co-authored-by: Samuel Attard <sattard@anthropic.com>
* ci: copy hermetic SDK symlink into out/ffmpeg and rewrite path
mac_sdk_path must live under root_build_dir, so pointing out/ffmpeg at
//out/Default/... doesn't work. Copy the xcode_links symlink tree into
out/ffmpeg and rewrite the path. Gate on Darwin so Windows/Linux don't
run the sed/cp at all.
Co-authored-by: Samuel Attard <sattard@anthropic.com>
---------
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <sattard@anthropic.com>
fix: enforce size constraints on window creation on Windows and Linux (#49906)
* enforce size constraints on window creation
* set constraints after resizing on init
* restore conditional centering
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Mitchell Cohen <mitch.cohen@me.com>
ci: make src-cache upload atomic and sweep orphaned temp files
The checkout action's cp of the ~6GB zstd archive directly to the final
path on the cache share is non-atomic; an interrupted copy or a
concurrent reader produces zstd "Read error (39): premature end" on
restore, and the truncated file then satisfies the existence check so
no later run repairs it.
Upload to a run-unique *.tar.upload-<run_id>-<attempt> temp name on the
share and mv to the final path, discarding our temp if a concurrent run
got there first. A new clean-orphaned-cache-uploads workflow removes
temp files older than 4h every 4 hours.
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Sam Attard <sattard@anthropic.com>
fix: re-enable MacWebContentsOcclusion with embedder window fix (#50579)
* fix: re-enable MacWebContentsOcclusion with embedder window fix
Replace the full revert of Chromium's MacWebContentsOcclusion cleanup
with a targeted patch that handles embedder windows shown after
WebContentsViewCocoa attachment. This lets us drop the feature flag
disable in feature_list.cc and re-enable upstream occlusion tracking.
Adds tests for show/hide event counts on macOS and visibility tracking
across multiple child WebContentsViews.
* test: drop show/hide event count assertion
The assertion that 'show' fires exactly once per w.show() call is not
an API guarantee - macOS can send multiple occlusion state
notifications during a single show() when other windows are on screen
(common on CI after hundreds of prior tests). The
visibilitychange-count test in api-web-contents-view-spec.ts covers
the actual invariant we care about.
* fix: ignore WebContentsOcclusionCheckerMac synthetic notifications in window delegate
On macOS 13.3-25.x, Chromium's occlusion checker enables manual
frame-intersection detection and posts synthetic
NSWindowDidChangeOcclusionStateNotification tagged with its class name
in userInfo. These fire when the checker's NSContainsRect heuristic
decides a window is covered by another window's frame, but the real
-[NSWindow occlusionState] hasn't changed.
Our delegate was treating these the same as real macOS notifications
and emitting show/hide events based on occlusionState, which was
unchanged - resulting in spurious duplicate show events when e.g.
Quick Look opened and its frame intersected the BrowserWindow.
