Use a TestBrowserThreadBundle in the DeviceSettingsTestBase.

chrome/browser/chromeos/policy/device_local_account_policy_service_unittest.cc

 // Copyright (c) 2012 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/policy/device_local_account_policy_service.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 141 matching lines @@
   service_.reset();
   extension_cache_task_runner_->RunUntilIdle();
   chromeos::DeviceSettingsTestBase::TearDown();
 }
 
 void DeviceLocalAccountPolicyServiceTestBase::CreatePolicyService() {
   service_.reset(new DeviceLocalAccountPolicyService(
       &device_settings_test_helper_,
       &device_settings_service_,
       &cros_settings_,
-      loop_.message_loop_proxy(),
+      base::MessageLoopProxy::current(),
       extension_cache_task_runner_,
-      loop_.message_loop_proxy(),
-      loop_.message_loop_proxy(),
-      new net::TestURLRequestContextGetter(
-          base::MessageLoop::current()->message_loop_proxy())));
+      base::MessageLoopProxy::current(),
+      base::MessageLoopProxy::current(),
+      new net::TestURLRequestContextGetter(base::MessageLoopProxy::current())));
 }
 
 void DeviceLocalAccountPolicyServiceTestBase::
     InstallDeviceLocalAccountPolicy(const std::string& account_id) {
   device_local_account_policy_.policy_data().set_settings_entity_id(account_id);
   device_local_account_policy_.policy_data().set_username(account_id);
   device_local_account_policy_.Build();
   device_settings_test_helper_.set_device_local_account_policy_blob(
       account_id, device_local_account_policy_.GetBlob());
 }
@@ skipping 767 matching lines @@
   em::DeviceManagementResponse response;
   device_local_account_policy_.Build();
   response.mutable_policy_response()->add_response()->CopyFrom(
       device_local_account_policy_.policy());
   request_job->SendResponse(DM_STATUS_SUCCESS, response);
   FlushDeviceSettings();
   Mock::VerifyAndClearExpectations(&provider_observer_);
 }
 
 }  // namespace policy