Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/chromeos/login/screens/chrome_user_selection_screen.cc

 // Copyright 2014 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/screens/chrome_user_selection_screen.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/login/ui/views/user_board_view.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/ui/webui/chromeos/login/l10n_util.h"
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 #include "components/policy/core/common/cloud/cloud_policy_core.h"
 #include "components/policy/core/common/cloud/cloud_policy_store.h"
 #include "components/policy/core/common/policy_map.h"
@@ skipping 71 matching lines @@
     // If a new display name was set by policy, notify the UI about it.
     view_->SetPublicSessionDisplayName(account_id, display_name);
     return;
   }
 
   // When no display name is set by policy, the |User|, owned by |UserManager|,
   // decides what display name to use. However, the order in which |UserManager|
   // and |this| are informed of the display name change is undefined. Post a
   // task that will update the UI after the UserManager is guaranteed to have
   // been informed of the change.
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&ChromeUserSelectionScreen::SetPublicSessionDisplayName,
                  weak_factory_.GetWeakPtr(), account_id));
 }
 
 void ChromeUserSelectionScreen::CheckForPublicSessionLocalePolicyChange(
     policy::DeviceLocalAccountPolicyBroker* broker) {
   const AccountId& account_id =
       user_manager::known_user::GetAccountId(broker->user_id(), std::string());
   DCHECK(account_id.is_valid());
@@ skipping 66 matching lines @@
   // advanced form (two or more recommended locales).
   const bool two_or_more_recommended_locales = recommended_locales.size() >= 2;
 
   // Notify the UI.
   view_->SetPublicSessionLocales(account_id, std::move(available_locales),
                                  default_locale,
                                  two_or_more_recommended_locales);
 }
 
 }  // namespace chromeos