Remove tons of OILPAN.

sky/engine/core/css/CSSStyleRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 112 matching lines @@
 }
 
 void CSSStyleRule::reattach(StyleRuleBase* rule)
 {
     ASSERT(rule);
     m_styleRule = toStyleRule(rule);
     if (m_propertiesCSSOMWrapper)
         m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
 }
 
-void CSSStyleRule::trace(Visitor* visitor)
-{
-    visitor->trace(m_styleRule);
-    visitor->trace(m_propertiesCSSOMWrapper);
-    CSSRule::trace(visitor);
-}
-
 } // namespace blink