remove memoryinstrumentation

Source/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 87 matching lines @@
 
     void willMutateRules();
     void didMutateRules();
     void didMutate();
     
     void clearChildRuleCSSOMWrappers();
     void reattachChildRuleCSSOMWrappers();
 
     StyleSheetContents* contents() const { return m_contents.get(); }
 
-    void reportMemoryUsage(MemoryObjectInfo*) const;
-
 private:
     CSSStyleSheet(PassRefPtr<StyleSheetContents>, CSSImportRule* ownerRule);
     CSSStyleSheet(PassRefPtr<StyleSheetContents>, Node* ownerNode, bool isInlineStylesheet);
 
     virtual bool isCSSStyleSheet() const { return true; }
     virtual String type() const { return "text/css"; }
 
     bool canAccessRules() const;
     
     RefPtr<StyleSheetContents> m_contents;
@@ skipping 26 matching lines @@
 
 inline CSSStyleSheet::RuleMutationScope::~RuleMutationScope()
 {
     if (m_styleSheet)
         m_styleSheet->didMutateRules();
 }
 
 } // namespace
 
 #endif