Add support for multiple icon sizes for Mac platform apps

chrome/browser/ui/views/aura/launcher/chrome_launcher_delegate.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_AURA_LAUNCHER_CHROME_LAUNCHER_DELEGATE_H_
 #define CHROME_BROWSER_UI_VIEWS_AURA_LAUNCHER_CHROME_LAUNCHER_DELEGATE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 117 matching lines @@
   bool IsOpen(ash::LauncherID id);
 
   // Returns the type of app for the specified id.
   AppType GetAppType(ash::LauncherID id);
 
   // Returns the id of the app for the specified tab.
   std::string GetAppID(TabContentsWrapper* tab);
 
   // Sets the image for an app tab. This is intended to be invoked from the
   // AppIconLoader.
-  void SetAppImage(const std::string& app_id, SkBitmap* image);
+  void SetAppImage(const std::string& app_id, const SkBitmap* image);
 
   ash::LauncherModel* model() { return model_; }
 
   // ash::LauncherDelegate overrides:
   virtual void CreateNewWindow() OVERRIDE;
   virtual void ItemClicked(const ash::LauncherItem& item) OVERRIDE;
   virtual int GetBrowserShortcutResourceId() OVERRIDE;
   virtual string16 GetTitle(const ash::LauncherItem& item) OVERRIDE;
   virtual ui::MenuModel* CreateContextMenu(
       const ash::LauncherItem& item) OVERRIDE;
@@ skipping 69 matching lines @@
 
   // Used to load the image for an app tab.
   scoped_ptr<AppIconLoader> app_icon_loader_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AURA_LAUNCHER_CHROME_LAUNCHER_DELEGATE_H_