mash: Move more shelf files to ash/common/shelf.

ash/common/shelf/shelf_layout_manager_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_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
-#define ASH_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
+#ifndef ASH_COMMON_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
+#define ASH_COMMON_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/wm/background_animator.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
@@ skipping 11 matching lines @@
   // Called when the auto hide state is changed.
   virtual void OnAutoHideStateChanged(ShelfAutoHideState new_state) {}
 
   // Called when shelf background animation is started.
   virtual void OnBackgroundUpdated(ShelfBackgroundType background_type,
                                    BackgroundAnimatorChangeType change_type) {}
 };
 
 }  // namespace ash
 
-#endif  // ASH_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_
+#endif  // ASH_COMMON_SHELF_SHELF_LAYOUT_MANAGER_OBSERVER_H_