Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/sync_manager_factory.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 "sync/internal_api/public/sync_manager_factory.h"
 
 #include "sync/internal_api/sync_manager_impl.h"
 
 namespace syncer {
 
 SyncManagerFactory::SyncManagerFactory() {}
 
 SyncManagerFactory::~SyncManagerFactory() {
 }
 
-scoped_ptr<SyncManager> SyncManagerFactory::CreateSyncManager(
+std::unique_ptr<SyncManager> SyncManagerFactory::CreateSyncManager(
     const std::string& name) {
-  return scoped_ptr<SyncManager>(new SyncManagerImpl(name));
+  return std::unique_ptr<SyncManager>(new SyncManagerImpl(name));
 }
 
 }  // namespace syncer