Simplify CachedResource::data

Source/WebCore/loader/cache/CachedShader.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 24 matching lines @@
 namespace WebCore {
 
 class TextResourceDecoder;
 
 class CachedShader : public CachedResource {
 public:
     CachedShader(const ResourceRequest&);
     virtual ~CachedShader();
     
     const String& shaderString();
-    void data(PassRefPtr<ResourceBuffer>, bool allDataReceived);
     
     virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
 
 private:
     RefPtr<TextResourceDecoder> m_decoder;
     String m_shaderString;
 };
 
 }
 
 
 #endif // CachedShader_h