Move Frame to the Oilpan heap.

Source/core/plugins/DOMPluginArray.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
     Copyright (C) 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 18 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class LocalFrame;
 class PluginData;
 
 class DOMPluginArray FINAL : public RefCountedWillBeGarbageCollectedFinalized<DOMPluginArray>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMPluginArray);
 public:
     static PassRefPtrWillBeRawPtr<DOMPluginArray> create(LocalFrame* frame)
     {
         return adoptRefWillBeNoop(new DOMPluginArray(frame));
     }
     virtual ~DOMPluginArray();
 
     unsigned length() const;
     PassRefPtrWillBeRawPtr<DOMPlugin> item(unsigned index);
     bool canGetItemsForName(const AtomicString& propertyName);
     PassRefPtrWillBeRawPtr<DOMPlugin> namedItem(const AtomicString& propertyName);
 
     void refresh(bool reload);
 
-    void trace(Visitor*) { }
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     explicit DOMPluginArray(LocalFrame*);
     PluginData* pluginData() const;
 };
 
 } // namespace blink
 
 #endif // PluginArray_h