Preload default wallpaper.

chrome/browser/chromeos/login/wallpaper_manager.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/login/wallpaper_manager.h"
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 84 matching lines @@
   local_state->RegisterDictionaryPref(prefs::kUsersWallpaperInfo,
                                       PrefService::UNSYNCABLE_PREF);
 }
 
 void WallpaperManager::AddObservers() {
   if (!DBusThreadManager::Get()->GetPowerManagerClient()->HasObserver(this))
     DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
   system::TimezoneSettings::GetInstance()->AddObserver(this);
 }
 
-void WallpaperManager::CacheIfCustomWallpaper(const std::string& email) {
+void WallpaperManager::CacheUserWallpaper(const std::string& email) {
   User::WallpaperType type;
   int index;
   base::Time date;
   GetUserWallpaperProperties(email, &type, &index, &date);
   if (type == User::CUSTOMIZED) {
     std::string wallpaper_path = GetWallpaperPathForUser(email, false).value();
 
     // Uses WeakPtr here to make the request cancelable.
     wallpaper_loader_->Start(wallpaper_path, 0,
                              base::Bind(&WallpaperManager::CacheWallpaper,
                                         weak_factory_.GetWeakPtr(), email));
+  } else {
+    ash::Shell::GetInstance()->desktop_background_controller()->
+        TriggerCacheDefaultWallpaper(index);
   }
 }
 
 void WallpaperManager::EnsureLoggedInUserWallpaperLoaded() {
   User::WallpaperType type;
   int index;
   base::Time last_modification_date;
   GetLoggedInUserWallpaperProperties(&type, &index, &last_modification_date);
 
   if (type != current_user_wallpaper_type_ ||
@@ skipping 451 matching lines @@
 
 void WallpaperManager::SystemResumed() {
   BatchUpdateWallpaper();
 }
 
 void WallpaperManager::TimezoneChanged(const icu::TimeZone& timezone) {
   RestartTimer();
 }
 
 }  // chromeos