Add a layer of indirection between Frame and Page

Source/core/frame/DOMWindow.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 523 matching lines @@
 {
     return frame() ? frame()->page() : 0;
 }
 
 void DOMWindow::frameDestroyed()
 {
     FrameDestructionObserver::frameDestroyed();
     reset();
 }
 
-void DOMWindow::willDetachPage()
+void DOMWindow::willDetachFrameHost()
 {
     InspectorInstrumentation::frameWindowDiscarded(m_frame, this);
 }
 
 void DOMWindow::willDestroyDocumentInFrame()
 {
     // It is necessary to copy m_properties to a separate vector because the DOMWindowProperties may
     // unregister themselves from the DOMWindow as a result of the call to willDestroyGlobalObjectInFrame.
     Vector<DOMWindowProperty*> properties;
     copyToVector(m_properties, properties);
@@ skipping 1322 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<DOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore