Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper_impl.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/enterprise_enrollment_helper_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/login/enrollment/enrollment_uma.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_initializer.h"
 #include "chrome/browser/chromeos/policy/enrollment_status_chromeos.h"
 #include "chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ skipping 28 matching lines @@
 }
 
 TokenRevoker::~TokenRevoker() {
 }
 
 void TokenRevoker::Start(const std::string& token) {
   gaia_fetcher_.StartRevokeOAuth2Token(token);
 }
 
 void TokenRevoker::OnOAuth2RevokeTokenCompleted() {
-  base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+  base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }
 
 }  // namespace
 
 namespace chromeos {
 
 EnterpriseEnrollmentHelperImpl::EnterpriseEnrollmentHelperImpl(
     EnrollmentStatusConsumer* status_consumer,
     const policy::EnrollmentConfig& enrollment_config,
     const std::string& enrolling_user_domain)
@@ skipping 337 matching lines @@
   EnrollmentUMA(sample, enrollment_config_.mode);
 }
 
 void EnterpriseEnrollmentHelperImpl::OnSigninProfileCleared(
     const base::Closure& callback) {
   auth_data_cleared_ = true;
   callback.Run();
 }
 
 }  // namespace chromeos