Remove tons of OILPAN.

sky/engine/core/frame/ImageBitmap.cpp

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/frame/ImageBitmap.h"
 
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/ImageData.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
@@ skipping 168 matching lines @@
     newDstRect.moveBy(dstRect->location());
     *srcRect = newSrcRect;
     *dstRect = newDstRect;
 }
 
 FloatSize ImageBitmap::sourceSize() const
 {
     return FloatSize(width(), height());
 }
 
-void ImageBitmap::trace(Visitor* visitor)
-{
-    visitor->trace(m_imageElement);
-    ImageLoaderClient::trace(visitor);
 }
-
-}