Add support for multiple icon sizes for Mac platform apps

chrome/browser/ui/webui/extensions/extension_icon_source.h

 // Copyright (c) 2011 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_WEBUI_EXTENSIONS_EXTENSION_ICON_SOURCE_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_ICON_SOURCE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 72 matching lines @@
 
   // Returns the bitmap for the default app image.
   const SkBitmap* GetDefaultAppImage();
 
   // Returns the bitmap for the default extension.
   const SkBitmap* GetDefaultExtensionImage();
 
   // Performs any remaining transformations (like desaturating the |image|),
   // then returns the |image| to the client and clears up any temporary data
   // associated with the |request_id|.
-  void FinalizeImage(SkBitmap* image, int request_id);
+  void FinalizeImage(const SkBitmap* image, int request_id);
 
   // Loads the default image for |request_id| and returns to the client.
   void LoadDefaultImage(int request_id);
 
   // Tries loading component extension image. These usually come from resources
   // instead of file system. Returns false if a given |icon| does not have
   // a corresponding image in bundled resources.
   bool TryLoadingComponentExtensionImage(const ExtensionResource& icon,
                                          int request_id);
 
   // Loads the extension's |icon| for the given |request_id| and returns the
   // image to the client.
   void LoadExtensionImage(const ExtensionResource& icon, int request_id);
 
   // Loads the favicon image for the app associated with the |request_id|. If
   // the image does not exist, we fall back to the default image.
   void LoadFaviconImage(int request_id);
 
   // FaviconService callback
   void OnFaviconDataAvailable(FaviconService::Handle request_handle,
                               history::FaviconData favicon);
 
   // ImageLoadingTracker::Observer
-  virtual void OnImageLoaded(SkBitmap* image,
-                             const ExtensionResource& resource,
+  virtual void OnImageLoaded(const gfx::Image* image,
+                             const std::string& extension_id,
                              int id) OVERRIDE;
 
   // Called when the extension doesn't have an icon. We fall back to multiple
   // sources, using the following order:
   //  1) The icons as listed in the extension / app manifests.
   //  2) If a 16px icon and the extension has a launch URL, see if Chrome
   //     has a corresponding favicon.
   //  3) If still no matches, load the default extension / application icon.
   void LoadIconFailed(int request_id);
 
@@ skipping 35 matching lines @@
   scoped_ptr<SkBitmap> default_app_data_;
 
   scoped_ptr<SkBitmap> default_extension_data_;
 
   CancelableRequestConsumerT<int, 0> cancelable_consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionIconSource);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_ICON_SOURCE_H_