Remove tons of OILPAN.

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

 /*
  * Copyright (C) 2009 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 44 matching lines @@
     GLsizei height() const { return m_height; }
 
     bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
 
     void setHasEverBeenBound() { m_hasEverBeenBound = true; }
 
     void setEmulatedStencilBuffer(PassRefPtr<WebGLRenderbuffer> buffer) { m_emulatedStencilBuffer = buffer; }
     WebGLRenderbuffer* emulatedStencilBuffer() const { return m_emulatedStencilBuffer.get(); }
     void deleteEmulatedStencilBuffer(blink::WebGraphicsContext3D* context3d);
 
-    virtual void trace(Visitor*) override;
-
 protected:
     explicit WebGLRenderbuffer(WebGLRenderingContextBase*);
 
     virtual void deleteObjectImpl(blink::WebGraphicsContext3D*, Platform3DObject) override;
 
 private:
     virtual bool isRenderbuffer() const override { return true; }
 
     GLenum m_internalFormat;
     GLsizei m_width, m_height;
 
     bool m_hasEverBeenBound;
 
     RefPtr<WebGLRenderbuffer> m_emulatedStencilBuffer;
 };
 
 } // namespace blink
 
 #endif // WebGLRenderbuffer_h