Oilpan: Make the Node hierarchy RefCountedGarbageCollected instead of TreeShared.

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 468 matching lines @@
         m_pendingStateObject = stateObject;
 }
 
 DOMWindow::~DOMWindow()
 {
     ASSERT(m_hasBeenReset);
     reset();
 
     removeAllEventListeners();
 
+#if ENABLE(OILPAN)
+    ASSERT(m_document->isDisposed());
+#else
     ASSERT(m_document->isStopped());
+#endif
+
     clearDocument();
 }
 
 const AtomicString& DOMWindow::interfaceName() const
 {
     return EventTargetNames::DOMWindow;
 }
 
 ExecutionContext* DOMWindow::executionContext() const
 {
@@ skipping 1365 matching lines @@
     visitor->trace(m_media);
     visitor->trace(m_sessionStorage);
     visitor->trace(m_localStorage);
     visitor->trace(m_applicationCache);
     visitor->trace(m_performance);
     visitor->trace(m_css);
     WillBeHeapSupplementable<DOMWindow>::trace(visitor);
 }
 
 } // namespace WebCore