Forcibly clear worker ref counts on shutdown.

chrome/browser/supervised_user/legacy/supervised_user_registration_utility_unittest.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/supervised_user/legacy/supervised_user_registration_utility.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 10 matching lines @@
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/sync/api/attachments/attachment_id.h"
 #include "components/sync/api/sync_change.h"
 #include "components/sync/api/sync_error_factory_mock.h"
 #include "components/sync/core/attachments/attachment_service_proxy_for_test.h"
 #include "components/sync/protocol/sync.pb.h"
 #include "components/syncable_prefs/testing_pref_service_syncable.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using sync_pb::ManagedUserSpecifics;
 using syncer::SUPERVISED_USERS;
 using syncer::SyncChange;
 using syncer::SyncChangeList;
 using syncer::SyncChangeProcessor;
 using syncer::SyncData;
@@ skipping 78 matching lines @@
   MockChangeProcessor* change_processor() { return change_processor_; }
 
   bool received_callback() const { return received_callback_; }
   const GoogleServiceAuthError& error() const { return error_; }
   const std::string& token() const { return token_; }
 
  private:
   void OnSupervisedUserRegistered(const GoogleServiceAuthError& error,
                                   const std::string& token);
 
-  base::MessageLoop message_loop_;
+  content::TestBrowserThreadBundle thread_bundle_;
   base::RunLoop run_loop_;
   TestingProfile profile_;
   SupervisedUserSyncService* service_;
   SupervisedUserSharedSettingsService* shared_settings_service_;
   std::unique_ptr<SupervisedUserRegistrationUtility> registration_utility_;
 
   // Owned by the SupervisedUserSyncService.
   MockChangeProcessor* change_processor_;
 
   // A unique ID for creating "remote" Sync data.
@@ skipping 153 matching lines @@
       SupervisedUserRegistrationUtility::GenerateNewSupervisedUserId(),
       SupervisedUserRegistrationInfo(base::ASCIIToUTF16("Mike"), 17),
       GetRegistrationCallback());
   EXPECT_EQ(1u, prefs()->GetDictionary(prefs::kSupervisedUsers)->size());
   service()->StopSyncing(SUPERVISED_USERS);
   EXPECT_EQ(0u, prefs()->GetDictionary(prefs::kSupervisedUsers)->size());
   EXPECT_TRUE(received_callback());
   EXPECT_EQ(GoogleServiceAuthError::REQUEST_CANCELED, error().state());
   EXPECT_EQ(std::string(), token());
 }