Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/policy/cloud/user_policy_signin_service_mobile.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/policy/cloud/user_policy_signin_service_mobile.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.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/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/common/pref_names.h"
 #include "components/policy/core/common/cloud/cloud_policy_client_registration_helper.h"
 #include "components/policy/core/common/cloud/user_cloud_policy_manager.h"
 #include "components/policy/core/common/policy_switches.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
@@ skipping 144 matching lines @@
   base::Time now = base::Time::Now();
   base::Time next_check_time = last_check_time + retry_delay;
 
   // Check immediately if no check was ever done before (last_check_time == 0),
   // or if the last check was in the future (?), or if we're already past the
   // next check time. Otherwise, delay checking until the next check time.
   base::TimeDelta try_registration_delay = base::TimeDelta::FromSeconds(5);
   if (now > last_check_time && now < next_check_time)
     try_registration_delay = next_check_time - now;
 
-  base::MessageLoop::current()->PostDelayedTask(
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&UserPolicySigninService::RegisterCloudPolicyService,
                  weak_factory_.GetWeakPtr()),
       try_registration_delay);
 }
 
 void UserPolicySigninService::RegisterCloudPolicyService() {
   // If the user signed-out while this task was waiting then Shutdown() would
   // have been called, which would have invalidated this task. Since we're here
   // then the user must still be signed-in.
@@ skipping 17 matching lines @@
 
 void UserPolicySigninService::CancelPendingRegistration() {
   weak_factory_.InvalidateWeakPtrs();
 }
 
 void UserPolicySigninService::OnRegistrationDone() {
   registration_helper_.reset();
 }
 
 }  // namespace policy