chromeos: Use gfx::ImageSkia instead of SkBitmap for downloaded profile image.

chrome/browser/chromeos/login/user_manager.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_CHROMEOS_LOGIN_USER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_H_
 
 #include <string>
 
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "base/memory/singleton.h"
 #include "base/time.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler.h"
 
-class SkBitmap;
 class FilePath;
 class PrefService;
 
+namespace gfx {
+class ImageSkia;
+}
+
 namespace chromeos {
 
 class RemoveUserDelegate;
 class UserImage;
 
 // Base class for UserManagerImpl - provides a mechanism for discovering users
 // who have logged into this Chrome OS device before and updating that list.
 class UserManager {
  public:
   // Interface that observers of UserManager must implement in order
@@ skipping 200 matching lines @@
   // or restart after crash.
   virtual bool IsSessionStarted() const = 0;
 
   virtual void AddObserver(Observer* obs) = 0;
   virtual void RemoveObserver(Observer* obs) = 0;
 
   virtual void NotifyLocalStateChanged() = 0;
 
   // Returns the result of the last successful profile image download, if any.
   // Otherwise, returns an empty bitmap.
-  virtual const SkBitmap& DownloadedProfileImage() const = 0;
+  virtual const gfx::ImageSkia& DownloadedProfileImage() const = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_H_