fix: ensure webcontents is destroyed before its associated browser context.

patches/common/chromium/.patches.yaml

@@ -477,3 +477,10 @@ patches:
     Pass RenderProcessHost through to PlatformNotificationService.
 
     This is so Electron can identify which renderer a notification came from.
+-
+  author: deepak1556 <hop2deep@gmail.com>
+  file: content_browser_main_loop.patch
+  description: |
+    Pass idle quit closure for main message loop, so that pending tasks are
+    run before shutdown. This is required to cleanup WebContents asynchronously
+    in atom::CommonWebContentsDelegate::ResetManageWebContents.

patches/common/chromium/content_browser_main_loop.patch

@@ -0,0 +1,13 @@
+diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
+index eb942391306e..9111cf18b7fc 100644
+--- a/content/browser/browser_main_loop.cc
++++ b/content/browser/browser_main_loop.cc
+@@ -1571,7 +1571,7 @@ void BrowserMainLoop::MainMessageLoopRun() {
+   }
+ 
+   base::RunLoop run_loop;
+-  parts_->PreDefaultMainMessageLoopRun(run_loop.QuitClosure());
++  parts_->PreDefaultMainMessageLoopRun(run_loop.QuitWhenIdleClosure());
+   run_loop.Run();
+ #endif
+ }