Componentize protocol_event_observer

components/sync_driver/protocol_event_observer.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 CHROME_BROWSER_SYNC_PROTOCOL_EVENT_OBSERVER_H_
-#define CHROME_BROWSER_SYNC_PROTOCOL_EVENT_OBSERVER_H_
+#ifndef COMPONENTS_SYNC_DRIVER_PROTOCOL_EVENT_OBSERVER_H_
+#define COMPONENTS_SYNC_DRIVER_PROTOCOL_EVENT_OBSERVER_H_
 
 namespace syncer {
 class ProtocolEvent;
 }
 
 namespace browser_sync {
 
 class ProtocolEventObserver {
  public:
   ProtocolEventObserver();
   virtual ~ProtocolEventObserver();
 
   virtual void OnProtocolEvent(const syncer::ProtocolEvent& event) = 0;
 };
 
 }  // namespace browser_sync
 
-#endif  // CHROME_BROWSER_SYNC_PROTOCOL_EVENT_OBSERVER_H_
+#endif  // COMPONENTS_SYNC_DRIVER_PROTOCOL_EVENT_OBSERVER_H_