Use hi-resolution favicon variants if available.

chrome/browser/ui/views/ash/launcher/launcher_favicon_loader.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
 #define CHROME_BROWSER_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 37 matching lines @@
   SkBitmap GetFavicon() const;
 
  private:
   // Message Handlers.
   void OnUpdateFaviconURL(int32 page_id,
                           const std::vector<FaviconURL>& candidates);
 
   void OnDidDownloadFavicon(int id,
                             const GURL& image_url,
                             bool errored,
-                            const SkBitmap& bitmap);
+                            int requested_size,
+                            const std::vector<SkBitmap>& bitmaps);
 
   scoped_ptr<internal::FaviconBitmapHandler> favicon_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherFaviconLoader);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_