electron/patches/chromium/blink_local_frame.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cheng Zhao <zcbenz@gmail.com>
Date: Thu, 20 Sep 2018 17:45:03 -0700
Subject: blink_local_frame.patch

According to electron/electron#3699, it is unreliable to use |unload|
event for process.exit('exit'), so we have to do that in
willReleaseScriptContext.

However Chromium then disallowed scripting in willReleaseScriptContext
in https://codereview.chromium.org/1657583002, and crash will happen
when there is code doing that.

This patch reverts the change to fix the crash in Electron.

diff --git a/third_party/blink/renderer/core/frame/local_frame.cc b/third_party/blink/renderer/core/frame/local_frame.cc
index 81585d785de936e300af913a0f37d90d3e1b62fb..d80e2b34ee8397f8880135dbc1a25622fb5e9dc2 100644
--- a/third_party/blink/renderer/core/frame/local_frame.cc
+++ b/third_party/blink/renderer/core/frame/local_frame.cc
@@ -538,10 +538,6 @@ void LocalFrame::DetachImpl(FrameDetachType type) {
   }
   CHECK(!view_ || !view_->IsAttached());
 
-  // This is the earliest that scripting can be disabled:
-  // - FrameLoader::Detach() can fire XHR abort events
-  // - Document::Shutdown() can dispose plugins which can run script.
-  ScriptForbiddenScope forbid_script;
   if (!Client())
     return;
 
@@ -559,6 +555,10 @@ void LocalFrame::DetachImpl(FrameDetachType type) {
   // Notify ScriptController that the frame is closing, since its cleanup ends
   // up calling back to LocalFrameClient via WindowProxy.
   GetScriptController().ClearForClose();
+  // This is the earliest that scripting can be disabled:
+  // - FrameLoader::Detach() can fire XHR abort events
+  // - Document::Shutdown() can dispose plugins which can run script.
+  ScriptForbiddenScope forbid_script;
 
   // TODO(crbug.com/729196): Trace why LocalFrameView::DetachFromLayout crashes.
   CHECK(!view_->IsAttached());