Remove tons of OILPAN.

sky/engine/core/dom/ElementDataCache.h

 /*
  * Copyright (C) 2012, 2013 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
 class Attribute;
 class ShareableElementData;
 
 class ElementDataCache {
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(ElementDataCache)
 public:
     static PassOwnPtr<ElementDataCache> create() { return adoptPtr(new ElementDataCache); }
 
     PassRefPtr<ShareableElementData> cachedShareableElementDataWithAttributes(const Vector<Attribute>&);
 
-    void trace(Visitor*);
-
 private:
     ElementDataCache();
 
     typedef HashMap<unsigned, RefPtr<ShareableElementData>, AlreadyHashed> ShareableElementDataCache;
     ShareableElementDataCache m_shareableElementDataCache;
 };
 
 }
 
 #endif