Changed previews component to be a layered component.

components/previews/core/previews_data_savings.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 CHROME_BROWSER_PREVIEWS_PREVIEWS_DATA_SAVINGS_H_
-#define CHROME_BROWSER_PREVIEWS_PREVIEWS_DATA_SAVINGS_H_
+#ifndef COMPONENTS_PREVIEWS_CORE_PREVIEWS_DATA_SAVINGS_H_
+#define COMPONENTS_PREVIEWS_CORE_PREVIEWS_DATA_SAVINGS_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 
 namespace data_reduction_proxy {
 class DataSavingsRecorder;
@@ skipping 24 matching lines @@
   data_reduction_proxy::DataSavingsRecorder* data_savings_recorder_;
 
   // Enforce usage on the UI thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(PreviewsDataSavings);
 };
 
 }  // namespace previews
 
-#endif  // CHROME_BROWSER_PREVIEWS_PREVIEWS_DATA_SAVINGS_H_
+#endif  // COMPONENTS_PREVIEWS_CORE_PREVIEWS_DATA_SAVINGS_H_