Remove tons of OILPAN.

sky/engine/core/html/canvas/CanvasPattern.h

 /*
  * Copyright (C) 2006, 2008 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 31 matching lines @@
 public:
     static Pattern::RepeatMode parseRepetitionType(const String&, ExceptionState&);
 
     static PassRefPtr<CanvasPattern> create(PassRefPtr<Image> image, Pattern::RepeatMode repeat)
     {
         return adoptRef(new CanvasPattern(image, repeat));
     }
 
     Pattern* pattern() const { return m_pattern.get(); }
 
-    void trace(Visitor*) { }
-
 private:
     CanvasPattern(PassRefPtr<Image>, Pattern::RepeatMode);
 
     RefPtr<Pattern> m_pattern;
 };
 
 } // namespace blink
 
 #endif // CanvasPattern_h