Speed up custom wallpaper switching time and wallpaper manager code refactor

chrome/browser/chromeos/login/user.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_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 68 matching lines @@
   bool has_animated_image() const { return user_image_.has_animated_image(); }
   // Returns raw representation of animated user image.
   const UserImage::RawImage& animated_image() const {
     return user_image_.animated_image();
   }
 
   // Returns the URL of user image, if there is any. Currently only the profile
   // image has a URL, for other images empty URL is returned.
   GURL image_url() const { return user_image_.url(); }
 
-  // The thumbnail of user custom wallpaper.
-  const SkBitmap& wallpaper_thumbnail() const { return wallpaper_thumbnail_; }
-
   // True if user image is a stub (while real image is being loaded from file).
   bool image_is_stub() const { return image_is_stub_; }
 
   // OAuth token status for this user.
   OAuthTokenStatus oauth_token_status() const { return oauth_token_status_; }
 
   // The displayed user name.
   string16 display_name() const { return display_name_; }
 
   // The displayed (non-canonical) user email.
@@ skipping 34 matching lines @@
   void set_display_email(const std::string& display_email) {
     display_email_ = display_email;
   }
 
   std::string email_;
   string16 display_name_;
   // The displayed user email, defaults to |email_|.
   std::string display_email_;
   UserImage user_image_;
   OAuthTokenStatus oauth_token_status_;
-  SkBitmap wallpaper_thumbnail_;
 
   // Either index of a default image for the user, |kExternalImageIndex| or
   // |kProfileImageIndex|.
   int image_index_;
 
   // True if current user image is a stub set by a |SetStubImage| call.
   bool image_is_stub_;
 
   DISALLOW_COPY_AND_ASSIGN(User);
 };
 
 // List of known users.
 typedef std::vector<User*> UserList;
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_H_