mash: Migrate ShelfLockingManager to ash/common.

ash/common/wm/lock_state_observer.h

 // Copyright 2013 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 ASH_WM_LOCK_STATE_OBSERVER_H_
-#define ASH_WM_LOCK_STATE_OBSERVER_H_
+#ifndef ASH_COMMON_WM_LOCK_STATE_OBSERVER_H_
+#define ASH_COMMON_WM_LOCK_STATE_OBSERVER_H_
 
 #include "ash/ash_export.h"
 
 namespace ash {
 
 // Interface for classes that want to be notified by LockStateController when
 // session-related events occur.
 class ASH_EXPORT LockStateObserver {
  public:
   enum EventType {
     EVENT_PRELOCK_ANIMATION_STARTED,
     EVENT_LOCK_ANIMATION_STARTED,
     EVENT_LOCK_ANIMATION_FINISHED,
   };
 
   virtual void OnLockStateEvent(EventType event) = 0;
   virtual ~LockStateObserver() {}
 };
 
 }  // namespace ash
 
-#endif  // ASH_WM_LOCK_STATE_OBSERVER_H_
+#endif  // ASH_COMMON_WM_LOCK_STATE_OBSERVER_H_