Oilpan: make DOMWindowProperty a GC mixin.

Source/core/frame/Location.h

 /*
  * Copyright (C) 2008, 2010 Apple Inc. All rights reserved.
  *
  * 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 25 matching lines @@
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class LocalDOMWindow;
 class ExceptionState;
 class LocalFrame;
 class KURL;
 
-class Location FINAL : public RefCountedWillBeGarbageCollectedFinalized<Location>, public ScriptWrappable, public DOMWindowProperty {
+class Location FINAL : public RefCountedWillBeGarbageCollected<Location>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Location);
 public:
     static PassRefPtrWillBeRawPtr<Location> create(LocalFrame* frame)
     {
         return adoptRefWillBeNoop(new Location(frame));
     }
 
     void setHref(LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow, const String&);
     String href() const;
 
     void assign(LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow, const String&);
@@ skipping 11 matching lines @@
     void setPathname(LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow, const String&);
     String pathname() const;
     void setSearch(LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow, const String&);
     String search() const;
     void setHash(LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow, const String&);
     String hash() const;
     String origin() const;
 
     PassRefPtrWillBeRawPtr<DOMStringList> ancestorOrigins() const;
 
-    void trace(Visitor*) { }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     explicit Location(LocalFrame*);
 
     void setLocation(const String&, LocalDOMWindow* callingWindow, LocalDOMWindow* enteredWindow);
 
     const KURL& url() const;
 };
 
 } // namespace blink
 
 #endif // Location_h