Revert "chromeos: Move files in //ash/common to //ash, part 3"

ash/wm/video_detector.h

 // Copyright (c) 2012 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_VIDEO_DETECTOR_H_
 #define ASH_WM_VIDEO_DETECTOR_H_
 
 #include <map>
 #include <memory>
 #include <set>
 
 #include "ash/ash_export.h"
-#include "ash/shell_observer.h"
+#include "ash/common/shell_observer.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/scoped_observer.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "ui/aura/env_observer.h"
 #include "ui/aura/window_observer.h"
 
 namespace aura {
@@ skipping 115 matching lines @@
   ScopedObserver<aura::Window, aura::WindowObserver> window_observer_manager_;
 
   bool is_shutting_down_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoDetector);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_VIDEO_DETECTOR_H_