Asynchronously load wallpapers when user pod is selected.

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 385 matching lines @@
         'browser/chrome_to_mobile_service_factory.h',
         'browser/chromeos/accessibility/accessibility_util.cc',
         'browser/chromeos/accessibility/accessibility_util.h',
         'browser/chromeos/audio/audio_handler.cc',
         'browser/chromeos/audio/audio_handler.h',
         'browser/chromeos/audio/audio_mixer.h',
         'browser/chromeos/audio/audio_mixer_alsa.cc',
         'browser/chromeos/audio/audio_mixer_alsa.h',
         'browser/chromeos/audio/audio_mixer_cras.cc',
         'browser/chromeos/audio/audio_mixer_cras.h',
-        'browser/chromeos/background/desktop_background_observer.cc',
-        'browser/chromeos/background/desktop_background_observer.h',
+        'browser/chromeos/background/ash_user_wallpaper_delegate.cc',
+        'browser/chromeos/background/ash_user_wallpaper_delegate.h',
         'browser/chromeos/bluetooth/bluetooth_adapter.cc',
         'browser/chromeos/bluetooth/bluetooth_adapter.h',
         'browser/chromeos/bluetooth/bluetooth_device.cc',
         'browser/chromeos/bluetooth/bluetooth_device.h',
         'browser/chromeos/bluetooth/bluetooth_service_record.cc',
         'browser/chromeos/bluetooth/bluetooth_service_record.h',
         'browser/chromeos/bluetooth/bluetooth_socket.cc',
         'browser/chromeos/bluetooth/bluetooth_socket.h',
         'browser/chromeos/bluetooth/bluetooth_utils.cc',
         'browser/chromeos/bluetooth/bluetooth_utils.h',
@@ skipping 4583 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/chromeos/gdata/gdata.proto' ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/gdata',
         'proto_out_dir': 'chrome/browser/chromeos/gdata',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }