Convert //sync from scoped_ptr to std::unique_ptr

sync/engine/directory_update_handler.h

 // 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.
 
 #ifndef SYNC_ENGINE_DIRECTORY_UPDATE_HANDLER_H_
 #define SYNC_ENGINE_DIRECTORY_UPDATE_HANDLER_H_
 
 #include <map>
+#include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "sync/base/sync_export.h"
 #include "sync/engine/process_updates_util.h"
 #include "sync/engine/update_handler.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/util/syncer_error.h"
 
 namespace sync_pb {
 class DataTypeProgressMarker;
 class GarbageCollectionDirective;
 class GetUpdatesResponse;
@@ skipping 74 matching lines @@
   SyncerError ApplyUpdatesImpl(sessions::StatusController* status);
 
   // Creates root node for the handled model type.
   void CreateTypeRoot(syncable::ModelNeutralWriteTransaction* trans);
 
   syncable::Directory* dir_;
   ModelType type_;
   scoped_refptr<ModelSafeWorker> worker_;
   DirectoryTypeDebugInfoEmitter* debug_info_emitter_;
 
-  scoped_ptr<sync_pb::GarbageCollectionDirective> cached_gc_directive_;
+  std::unique_ptr<sync_pb::GarbageCollectionDirective> cached_gc_directive_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectoryUpdateHandler);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_DIRECTORY_UPDATE_HANDLER_H_