mash: Move tray settings and deps to common.

ash/common/system/chromeos/power/tray_power.h

Index: ash/common/system/chromeos/power/tray_power.h
diff --git a/ash/system/chromeos/power/tray_power.h b/ash/common/system/chromeos/power/tray_power.h
similarity index 93%
rename from ash/system/chromeos/power/tray_power.h
rename to ash/common/system/chromeos/power/tray_power.h
index 4f47be894555a300944a4c2313a7ebe41fb1ed13..9ad7516c327f5818f8660e3aef02a8fcbbf4809e 100644
--- a/ash/system/chromeos/power/tray_power.h
+++ b/ash/common/system/chromeos/power/tray_power.h
@@ -2,13 +2,13 @@
 // 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_TRAY_POWER_H_
-#define ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
+#ifndef ASH_COMMON_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
 
 #include <memory>
 
+#include "ash/common/system/chromeos/power/power_status.h"
 #include "ash/common/system/tray/system_tray_item.h"
-#include "ash/system/chromeos/power/power_status.h"
 #include "base/macros.h"
 
 class SkBitmap;
@@ -121,4 +121,4 @@ class ASH_EXPORT TrayPower : public SystemTrayItem,
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_