remove memoryinstrumentation

Source/core/css/StyleSheetContents.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 118 matching lines @@
     void unregisterClient(CSSStyleSheet*);
     bool hasOneClient() { return m_clients.size() == 1; }
 
     bool isMutable() const { return m_isMutable; }
     void setMutable() { m_isMutable = true; }
 
     bool isInMemoryCache() const { return m_isInMemoryCache; }
     void addedToMemoryCache();
     void removedFromMemoryCache();
 
-    void reportMemoryUsage(MemoryObjectInfo*) const;
-
     void shrinkToFit();
 
 private:
     StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext&);
     StyleSheetContents(const StyleSheetContents&);
 
     void clearCharsetRule();
 
     StyleRuleImport* m_ownerRule;
 
@@ skipping 14 matching lines @@
     bool m_isInMemoryCache : 1;
     
     CSSParserContext m_parserContext;
 
     Vector<CSSStyleSheet*> m_clients;
 };
 
 } // namespace
 
 #endif