Asynchronously load wallpapers when user pod is selected.

ash/accelerators/accelerator_controller.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 "ash/accelerators/accelerator_controller.h"
 
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/ash_switches.h"
 #include "ash/caps_lock_delegate.h"
@@ skipping 173 matching lines @@
   return true;
 }
 
 bool HandleToggleDesktopBackgroundMode() {
   ash::DesktopBackgroundController* desktop_background_controller =
       ash::Shell::GetInstance()->desktop_background_controller();
   if (desktop_background_controller->desktop_background_mode() ==
       ash::DesktopBackgroundController::BACKGROUND_IMAGE)
     desktop_background_controller->SetDesktopBackgroundSolidColorMode();
   else
-    desktop_background_controller->SetDesktopBackgroundImageMode();
+    desktop_background_controller->SetLoggedInUserWallpaper();
   return true;
 }
 
 bool HandleToggleRootWindowFullScreen() {
   ash::Shell::GetRootWindow()->ToggleFullScreen();
   return true;
 }
 
 bool HandlePrintLayerHierarchy() {
   aura::RootWindow* root_window = ash::Shell::GetRootWindow();
@@ skipping 299 matching lines @@
     // Then set this one as active.
     ActivateLauncherItem(found_index);
   }
 }
 
 bool AcceleratorController::CanHandleAccelerators() const {
   return true;
 }
 
 }  // namespace ash