[Sync] Rewriting ".reset(new" pattern to use "= base::MakeUnique" instead.

components/sync/driver/glue/sync_backend_host_impl.cc

 // Copyright 2013 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 "components/sync/driver/glue/sync_backend_host_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/invalidation/public/invalidation_service.h"
 #include "components/invalidation/public/object_id_invalidation_map.h"
 #include "components/signin/core/browser/signin_client.h"
 #include "components/sync/base/experiments.h"
 #include "components/sync/base/invalidation_helper.h"
 #include "components/sync/base/sync_prefs.h"
 #include "components/sync/driver/glue/sync_backend_host_core.h"
 #include "components/sync/driver/glue/sync_backend_registrar.h"
 #include "components/sync/driver/sync_client.h"
@@ skipping 53 matching lines @@
     const WeakHandle<JsEventHandler>& event_handler,
     const GURL& sync_service_url,
     const std::string& sync_user_agent,
     const SyncCredentials& credentials,
     bool delete_sync_data_folder,
     std::unique_ptr<SyncManagerFactory> sync_manager_factory,
     const WeakHandle<UnrecoverableErrorHandler>& unrecoverable_error_handler,
     const base::Closure& report_unrecoverable_error_function,
     const HttpPostProviderFactoryGetter& http_post_provider_factory_getter,
     std::unique_ptr<SyncEncryptionHandler::NigoriState> saved_nigori_state) {
-  registrar_.reset(new SyncBackendRegistrar(name_, sync_client_,
-                                            std::move(sync_thread), ui_thread_,
-                                            db_thread, file_thread));
+  registrar_ = base::MakeUnique<SyncBackendRegistrar>(
+      name_, sync_client_, std::move(sync_thread), ui_thread_, db_thread,
+      file_thread);
   CHECK(registrar_->sync_thread());
 
   frontend_ = frontend;
   DCHECK(frontend);
 
   std::vector<scoped_refptr<ModelSafeWorker>> workers;
   registrar_->GetWorkers(&workers);
 
   EngineComponentsFactory::Switches factory_switches = {
       EngineComponentsFactory::ENCRYPTION_KEYSTORE,
@@ skipping 717 matching lines @@
     const SyncManager::ClearServerDataCallback& frontend_callback) {
   DCHECK(ui_thread_->BelongsToCurrentThread());
   frontend_callback.Run();
 }
 
 }  // namespace syncer
 
 #undef SDVLOG
 
 #undef SLOG