Make sure pages that are closing but not yet closed are still suspended.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 459 matching lines @@
 
 bool ChromeClientImpl::openBeforeUnloadConfirmPanelDelegate(LocalFrame* frame,
                                                             bool isReload) {
   notifyPopupOpeningObservers();
   WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(frame);
   return webframe->client() &&
          webframe->client()->runModalBeforeUnloadDialog(isReload);
 }
 
 void ChromeClientImpl::closeWindowSoon() {
-  // Make sure this Page can no longer be found by JS.
-  m_webView->page()->willBeClosed();
-
-  // Make sure that all loading is stopped.  Ensures that JS stops executing!
-  m_webView->mainFrame()->stopLoading();
-
   if (m_webView->client())
     m_webView->client()->closeWidgetSoon();
 }
 
 // Although a LocalFrame is passed in, we don't actually use it, since we
 // already know our own m_webView.
 bool ChromeClientImpl::openJavaScriptAlertDelegate(LocalFrame* frame,
                                                    const String& message) {
   notifyPopupOpeningObservers();
   WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(frame);
@@ skipping 669 matching lines @@
   if (RuntimeEnabledFeatures::presentationEnabled())
     PresentationController::provideTo(frame, client->presentationClient());
   if (RuntimeEnabledFeatures::audioOutputDevicesEnabled())
     provideAudioOutputDeviceClientTo(frame,
                                      AudioOutputDeviceClientImpl::create());
   if (RuntimeEnabledFeatures::installedAppEnabled())
     InstalledAppController::provideTo(frame, client->installedAppClient());
 }
 
 }  // namespace blink