Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/chromeos/login/enrollment/auto_enrollment_check_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/enrollment/auto_enrollment_check_screen.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
+#include "base/location.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/login/error_screens_histogram_helper.h"
 #include "chrome/browser/chromeos/login/screen_manager.h"
 #include "chrome/browser/chromeos/login/screens/base_screen_delegate.h"
 #include "chrome/browser/chromeos/login/screens/error_screen.h"
 #include "chrome/browser/chromeos/login/screens/network_error.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 
@@ skipping 221 matching lines @@
   histogram_helper_->OnErrorShow(error_state);
 }
 
 void AutoEnrollmentCheckScreen::SignalCompletion() {
   network_portal_detector::GetInstance()->RemoveObserver(this);
   auto_enrollment_progress_subscription_.reset();
   connect_request_subscription_.reset();
 
   // Calling Finish() can cause |this| destruction, so let other methods finish
   // their work before.
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(
           &AutoEnrollmentCheckScreen::Finish, weak_ptr_factory_.GetWeakPtr(),
           BaseScreenDelegate::ENTERPRISE_AUTO_ENROLLMENT_CHECK_COMPLETED));
 }
 
 bool AutoEnrollmentCheckScreen::IsCompleted() const {
   switch (auto_enrollment_controller_->state()) {
     case policy::AUTO_ENROLLMENT_STATE_IDLE:
     case policy::AUTO_ENROLLMENT_STATE_PENDING:
     case policy::AUTO_ENROLLMENT_STATE_CONNECTION_ERROR:
       return false;
     case policy::AUTO_ENROLLMENT_STATE_SERVER_ERROR:
       // Server errors don't block OOBE.
     case policy::AUTO_ENROLLMENT_STATE_TRIGGER_ENROLLMENT:
     case policy::AUTO_ENROLLMENT_STATE_NO_ENROLLMENT:
       // Decision made, ready to proceed.
       return true;
   }
   NOTREACHED();
   return false;
 }
 
 void AutoEnrollmentCheckScreen::OnConnectRequested() {
   auto_enrollment_controller_->Retry();
 }
 
 }  // namespace chromeos