chromeos: Move files in //ash/common to //ash, part 1

ash/system/power/video_activity_notifier.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_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
-#define ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+#ifndef ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+#define ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/video_detector.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/time/time.h"
 
 namespace ash {
 
 // Notifies the power manager when a video is playing.
@@ skipping 36 matching lines @@
 
   // Periodically calls MaybeNotifyPowerManager() while
   // should_notify_power_manager() is true.
   base::RepeatingTimer notify_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoActivityNotifier);
 };
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+#endif  // ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_