Remove various Heap* types.

sky/engine/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 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 190 matching lines @@
     void enqueuePopstateEvent(PassRefPtr<SerializedScriptValue>);
     void dispatchWindowLoadEvent();
     void documentWasClosed();
     void statePopped(PassRefPtr<SerializedScriptValue>);
 
     // FIXME: This shouldn't be public once LocalDOMWindow becomes ExecutionContext.
     void clearEventQueue();
 
     void acceptLanguagesChanged();
 
-    virtual void trace(Visitor*) override;
-
 protected:
     DOMWindowLifecycleNotifier& lifecycleNotifier();
 
 private:
     explicit LocalDOMWindow(LocalFrame&);
 
     Page* page();
 
     virtual void frameDestroyed() override;
     virtual void willDetachFrameHost() override;
@@ skipping 30 matching lines @@
 
     mutable RefPtr<DOMWindowCSS> m_css;
 
     RefPtr<DOMWindowEventQueue> m_eventQueue;
     RefPtr<SerializedScriptValue> m_pendingStateObject;
 };
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h