[Sync] Move sync's ModelSafeWorker implementations to engine/.

components/sync/engine/ui_model_worker.h

 // 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.
 
-#ifndef COMPONENTS_SYNC_DRIVER_GLUE_UI_MODEL_WORKER_H_
-#define COMPONENTS_SYNC_DRIVER_GLUE_UI_MODEL_WORKER_H_
+#ifndef COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_
+#define COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "components/sync/engine/model_safe_worker.h"
 
 namespace syncer {
 
 // A ModelSafeWorker for UI models (e.g. bookmarks) that
 // accepts work requests from the syncapi that need to be fulfilled
@@ skipping 13 matching lines @@
   ~UIModelWorker() override;
 
   // A reference to the UI thread's task runner.
   const scoped_refptr<base::SingleThreadTaskRunner> ui_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(UIModelWorker);
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_GLUE_UI_MODEL_WORKER_H_
+#endif  // COMPONENTS_SYNC_ENGINE_UI_MODEL_WORKER_H_