Enable robust decoding of custom wallpaper and allow custom wallpaper on login page

chrome/browser/chromeos/login/user_manager_impl.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/user_manager_impl.h"
 
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
@@ skipping 170 matching lines @@
   cryptohome::AsyncMethodCaller::GetInstance()->AsyncRemove(
       user_email, base::Bind(&OnRemoveUserComplete, user_email));
 
   if (delegate)
     delegate->OnUserRemoved(user_email);
 }
 
 }  // namespace
 
 UserManagerImpl::UserManagerImpl()
-    : ALLOW_THIS_IN_INITIALIZER_LIST(image_loader_(new UserImageLoader)),
+    : image_loader_(new UserImageLoader(ImageDecoder::DEFAULT_CODEC)),
       logged_in_user_(NULL),
       session_started_(false),
       is_current_user_owner_(false),
       is_current_user_new_(false),
       is_current_user_ephemeral_(false),
       ephemeral_users_enabled_(false),
       observed_sync_service_(NULL),
       last_image_set_async_(false),
       downloaded_profile_image_data_url_(chrome::kAboutBlankURL),
       downloading_profile_image_(false) {
@@ skipping 1186 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::FILE,
         FROM_HERE,
         base::Bind(&UserManagerImpl::DeleteUserImage,
                    base::Unretained(this),
                    image_path));
   }
 }
 
 }  // namespace chromeos