Simplify CachedResource::data

Source/WebCore/loader/cache/CachedCSSStyleSheet.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008 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 29 matching lines @@
     public:
         CachedCSSStyleSheet(const ResourceRequest&, const String& charset);
         virtual ~CachedCSSStyleSheet();
 
         const String sheetText(bool enforceMIMEType = true, bool* hasValidMIMEType = 0) const;
 
         virtual void didAddClient(CachedResourceClient*);
         
         virtual void setEncoding(const String&);
         virtual String encoding() const;
-        virtual void data(PassRefPtr<ResourceBuffer> data, bool allDataReceived);
         virtual void destroyDecodedData() OVERRIDE;
 
         PassRefPtr<StyleSheetContents> restoreParsedStyleSheet(const CSSParserContext&);
         void saveParsedStyleSheet(PassRefPtr<StyleSheetContents>);
     
         virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
 
     private:
         bool canUseSheet(bool enforceMIMEType, bool* hasValidMIMEType) const;
         virtual PurgePriority purgePriority() const { return PurgeLast; }
 
     protected:
         virtual void checkNotify();
 
         RefPtr<TextResourceDecoder> m_decoder;
         String m_decodedSheetText;
 
         RefPtr<StyleSheetContents> m_parsedStyleSheetCache;
     };
 
 }
 
 #endif