Remove tons of OILPAN.

sky/engine/core/css/CSSStyleSheet.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 83 matching lines @@
     void didMutateRules();
     void didMutate(StyleSheetUpdateType = PartialRuleUpdate);
 
     void clearChildRuleCSSOMWrappers();
 
     StyleSheetContents* contents() const { return m_contents.get(); }
 
     bool isInline() const { return m_isInlineStylesheet; }
     TextPosition startPositionInSource() const { return m_startPosition; }
 
-    virtual void trace(Visitor*) override;
-
 private:
     CSSStyleSheet(PassRefPtr<StyleSheetContents>);
     CSSStyleSheet(PassRefPtr<StyleSheetContents>, Node* ownerNode, bool isInlineStylesheet, const TextPosition& startPosition);
 
     virtual bool isCSSStyleSheet() const override { return true; }
     virtual String type() const override { return "text/css"; }
 
     void reattachChildRuleCSSOMWrappers();
 
     RefPtr<StyleSheetContents> m_contents;
@@ skipping 26 matching lines @@
 {
     if (m_styleSheet)
         m_styleSheet->didMutateRules();
 }
 
 DEFINE_TYPE_CASTS(CSSStyleSheet, StyleSheet, sheet, sheet->isCSSStyleSheet(), sheet.isCSSStyleSheet());
 
 } // namespace blink
 
 #endif