Reland "Implement random wallpaper feature"

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 "base/logging.h"
@@ skipping 10 matching lines @@
 
 class UserWallpaperDelegate: public ash::UserWallpaperDelegate {
  public:
   UserWallpaperDelegate() {
   }
 
   virtual ~UserWallpaperDelegate() {
   }
 
   virtual const int GetUserWallpaperIndex() OVERRIDE {
-    return chromeos::UserManager::Get()->GetUserWallpaperIndex();
+    return chromeos::UserManager::Get()->GetLoggedInUserWallpaperIndex();
   }
 
   virtual void OpenSetWallpaperPage() OVERRIDE {
     Browser* browser = Browser::GetOrCreateTabbedBrowser(
         ProfileManager::GetDefaultProfileOrOffTheRecord());
     browser->ShowOptionsTab("setWallpaper");
   }
 
   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
     return !chromeos::UserManager::Get()->IsLoggedInAsGuest();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
 };
 
 }  // namespace
 
 ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() {
   return new chromeos::UserWallpaperDelegate();
 }
 
 }  // namespace chromeos