Call ContextLifecycleObserver::contextDestroyed() when a window object is reset

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 469 matching lines @@
     m_properties.remove(property);
 }
 
 void LocalDOMWindow::registerEventListenerObserver(EventListenerObserver* eventListenerObserver)
 {
     m_eventListenerObservers.add(eventListenerObserver);
 }
 
 void LocalDOMWindow::reset()
 {
+    DCHECK(document());
+    document()->notifyContextDestroyed();
     frameDestroyed();
 
     m_screen = nullptr;
     m_history = nullptr;
     m_locationbar = nullptr;
     m_menubar = nullptr;
     m_personalbar = nullptr;
     m_scrollbars = nullptr;
     m_statusbar = nullptr;
     m_toolbar = nullptr;
@@ skipping 1014 matching lines @@
 LocalFrame* LocalDOMWindow::frame() const
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     SECURITY_DCHECK(!m_frame || m_frame->domWindow() == this);
     return m_frame;
 }
 
 } // namespace blink