Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/chromeos/shutdown_policy_browsertest.cc

 // Copyright 2015 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 <memory>
 #include <string>
 
 #include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/system/date/date_default_view.h"
 #include "ash/system/date/tray_date.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/tray_popup_header_button.h"
 #include "ash/system/user/login_status.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker_tester.h"
 #include "chrome/browser/chromeos/login/lock/webui_screen_locker.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/ui/webui_login_view.h"
 #include "chrome/browser/chromeos/policy/device_policy_builder.h"
 #include "chrome/browser/chromeos/policy/device_policy_cros_browser_test.h"
 #include "chrome/browser/chromeos/policy/proto/chrome_device_policy.pb.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
@@ skipping 268 matching lines @@
     contents_ = web_ui->GetWebContents();
     ASSERT_TRUE(contents_);
 
     // Wait for the login UI to be ready.
     WaitUntilOobeUIIsReady(host->GetOobeUI());
   }
 
   void TearDownOnMainThread() override {
     // If the login display is still showing, exit gracefully.
     if (LoginDisplayHost::default_host()) {
-      base::MessageLoop::current()->PostTask(FROM_HERE,
-                                             base::Bind(&chrome::AttemptExit));
+      base::ThreadTaskRunnerHandle::Get()->PostTask(
+          FROM_HERE, base::Bind(&chrome::AttemptExit));
       content::RunMessageLoop();
     }
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShutdownPolicyLoginTest);
 };
 
 IN_PROC_BROWSER_TEST_F(ShutdownPolicyLoginTest, PolicyNotSet) {
   PrepareAndRunScript("restart-header-bar-item", true);
   PrepareAndRunScript("shutdown-header-bar-item", false);
 }
 
 IN_PROC_BROWSER_TEST_F(ShutdownPolicyLoginTest, PolicyChange) {
   UpdateRebootOnShutdownPolicy(true);
   RefreshDevicePolicy();
   PrepareAndRunScript("restart-header-bar-item", false);
   PrepareAndRunScript("shutdown-header-bar-item", true);
 
   UpdateRebootOnShutdownPolicy(false);
   RefreshDevicePolicy();
   PrepareAndRunScript("restart-header-bar-item", true);
   PrepareAndRunScript("shutdown-header-bar-item", false);
 }
 
 }  // namespace chromeos