First fix to minimize copying of image data.

views/widget/default_theme_provider.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef VIEWS_DEFAULT_THEME_PROVIDER_H_
 #define VIEWS_DEFAULT_THEME_PROVIDER_H_
 
 #include <vector>
 
 #include "app/theme_provider.h"
@@ skipping 12 matching lines @@
   // Overridden from ThemeProvider.
   virtual void Init(Profile* profile) { }
   virtual SkBitmap* GetBitmapNamed(int id) const;
   virtual SkColor GetColor(int id) const {
     // Return debugging-blue.
     return 0xff0000ff;
   }
   virtual bool GetDisplayProperty(int id, int* result) const { return false; }
   virtual bool ShouldUseNativeFrame() const;
   virtual bool HasCustomImage(int id) const { return false; }
-  virtual bool GetRawData(int id, std::vector<unsigned char>* raw_data) const {
-    return false;
-  }
+  virtual RefCountedMemory* GetRawData(int id) const { return NULL; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DefaultThemeProvider);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_DEFAULT_THEME_PROVIDER_H_