Remove tons of OILPAN.

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

 /*
  * 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 58 matching lines @@
 }
 
 void WebGLRenderbuffer::deleteEmulatedStencilBuffer(blink::WebGraphicsContext3D* context3d)
 {
     if (!m_emulatedStencilBuffer)
         return;
     m_emulatedStencilBuffer->deleteObject(context3d);
     m_emulatedStencilBuffer.clear();
 }
 
-void WebGLRenderbuffer::trace(Visitor* visitor)
-{
-    visitor->trace(m_emulatedStencilBuffer);
-    WebGLSharedObject::trace(visitor);
 }
-
-}