Changed previews component to be a layered component.

components/previews/core/previews_ui_service.h

 // Copyright 2016 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_PREVIEWS_PREVIEWS_UI_SERVICE_H_
-#define COMPONENTS_PREVIEWS_PREVIEWS_UI_SERVICE_H_
+#ifndef COMPONENTS_PREVIEWS_CORE_PREVIEWS_UI_SERVICE_H_
+#define COMPONENTS_PREVIEWS_CORE_PREVIEWS_UI_SERVICE_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_checker.h"
 
 namespace previews {
@@ skipping 21 matching lines @@
   // The IO thread task runner. Used to post tasks to |io_data_|.
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   base::WeakPtrFactory<PreviewsUIService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PreviewsUIService);
 };
 
 }  // namespace previews
 
-#endif  // COMPONENTS_PREVIEWS_PREVIEWS_UI_SERVICE_H_
+#endif  // COMPONENTS_PREVIEWS_CORE_PREVIEWS_UI_SERVICE_H_