Oilpan: Unship Oilpan from CSSValues

Source/core/css/CSSCanvasValue.cpp

 /*
  * Copyright (C) 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 83 matching lines @@
         return nullptr;
     UseCounter::count(layoutObject->document(), UseCounter::WebkitCanvas);
     return elt->copiedImage(FrontBuffer);
 }
 
 bool CSSCanvasValue::equals(const CSSCanvasValue& other) const
 {
     return m_name == other.m_name;
 }
 
-DEFINE_TRACE_AFTER_DISPATCH(CSSCanvasValue)
-{
-    visitor->trace(m_canvasObserver);
-    visitor->trace(m_element);
-    CSSImageGeneratorValue::traceAfterDispatch(visitor);
-}
-
 } // namespace blink