Speed up custom wallpaper switching time and wallpaper manager code refactor

chrome/browser/chromeos/background/ash_user_wallpaper_delegate.cc

 // 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.
 
 #include "chrome/browser/chromeos/background/ash_user_wallpaper_delegate.h"
 
 #include "ash/shell.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "ash/wm/window_animations.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "chrome/browser/chromeos/extensions/wallpaper_manager_util.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/browser/chromeos/login/wallpaper_manager.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/notification_service.h"
 
 namespace chromeos {
@@ skipping 17 matching lines @@
 
     bool is_registered = WizardController::IsDeviceRegistered();
     // TODO(nkostylev): Figure out whether this would affect autotests as well.
     if (is_registered)
       return ash::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE;
     else
       return ash::WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE;
   }
 
   virtual void InitializeWallpaper() OVERRIDE {
-    chromeos::UserManager::Get()->InitializeWallpaper();
+    chromeos::WallpaperManager::Get()->InitializeWallpaper();
   }
 
   virtual void OpenSetWallpaperPage() OVERRIDE {
     wallpaper_manager_util::OpenWallpaperManager();
   }
 
   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
     return !chromeos::UserManager::Get()->IsLoggedInAsGuest();
   }
 
   virtual void OnWallpaperAnimationFinished() OVERRIDE {
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED,
         content::NotificationService::AllSources(),
         content::NotificationService::NoDetails());
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
 };
 
 }  // namespace
 
 ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() {
   return new chromeos::UserWallpaperDelegate();
 }
 
 }  // namespace chromeos