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

ash/system/power/video_activity_notifier.h

Index: ash/system/power/video_activity_notifier.h
diff --git a/ash/system/chromeos/power/video_activity_notifier.h b/ash/system/power/video_activity_notifier.h
similarity index 90%
rename from ash/system/chromeos/power/video_activity_notifier.h
rename to ash/system/power/video_activity_notifier.h
index bf941fd029bf497af08b3ad71ae4877d87f8f83b..a3b378db26d29239ff34d1bb7e7dd45e3bcdb081 100644
--- a/ash/system/chromeos/power/video_activity_notifier.h
+++ b/ash/system/power/video_activity_notifier.h
@@ -2,8 +2,8 @@
 // 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"
@@ -60,4 +60,4 @@ class ASH_EXPORT VideoActivityNotifier : public VideoDetector::Observer,
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_VIDEO_ACTIVITY_NOTIFIER_H_
+#endif  // ASH_SYSTEM_POWER_VIDEO_ACTIVITY_NOTIFIER_H_