Renames ash/wm/common into ash/common/wm

ash/common/wm/wm_window_observer.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 ASH_WM_COMMON_WM_WINDOW_OBSERVER_H_
-#define ASH_WM_COMMON_WM_WINDOW_OBSERVER_H_
+#ifndef ASH_COMMON_WM_WM_WINDOW_OBSERVER_H_
+#define ASH_COMMON_WM_WM_WINDOW_OBSERVER_H_
 
 #include <stdint.h>
 
 #include "ash/ash_export.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ash {
@@ skipping 30 matching lines @@
 
   virtual void OnWindowTitleChanged(wm::WmWindow* window) {}
 
  protected:
   virtual ~WmWindowObserver() {}
 };
 
 }  // namespace wm
 }  // namespace ash
 
-#endif  // ASH_WM_COMMON_WM_WINDOW_OBSERVER_H_
+#endif  // ASH_COMMON_WM_WM_WINDOW_OBSERVER_H_