Remove tons of OILPAN.

sky/engine/core/css/CSSRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * 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 47 matching lines @@
         m_parentIsRule = false;
         m_parentStyleSheet = styleSheet;
     }
 
     void setParentRule(CSSRule* rule)
     {
         m_parentIsRule = true;
         m_parentRule = rule;
     }
 
-    virtual void trace(Visitor*);
-
     CSSStyleSheet* parentStyleSheet() const
     {
         if (m_parentIsRule)
             return m_parentRule ? m_parentRule->parentStyleSheet() : 0;
         return m_parentStyleSheet;
     }
 
     CSSRule* parentRule() const { return m_parentIsRule ? m_parentRule : 0; }
 
     // NOTE: Just calls notImplemented().
@@ skipping 22 matching lines @@
         CSSStyleSheet* m_parentStyleSheet;
     };
 };
 
 #define DEFINE_CSS_RULE_TYPE_CASTS(ToType, TYPE_NAME) \
     DEFINE_TYPE_CASTS(ToType, CSSRule, rule, rule->type() == CSSRule::TYPE_NAME, rule.type() == CSSRule::TYPE_NAME)
 
 } // namespace blink
 
 #endif // CSSRule_h