mash: Move tray settings and deps to common.

ash/system/chromeos/power/battery_notification.h

Index: ash/system/chromeos/power/battery_notification.h
diff --git a/ash/system/chromeos/power/battery_notification.h b/ash/system/chromeos/power/battery_notification.h
deleted file mode 100644
index 24284d19f8160df4b3889dd09adb4f4669ec1d96..0000000000000000000000000000000000000000
--- a/ash/system/chromeos/power/battery_notification.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2015 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_BATTERY_NOTIFICATION_H_
-#define ASH_SYSTEM_CHROMEOS_POWER_BATTERY_NOTIFICATION_H_
-
-#include "ash/ash_export.h"
-#include "ash/system/chromeos/power/tray_power.h"
-#include "base/macros.h"
-
-namespace message_center {
-class MessageCenter;
-}
-
-namespace ash {
-
-// Class for showing and hiding a MessageCenter low battery notification.
-class ASH_EXPORT BatteryNotification {
- public:
-  BatteryNotification(message_center::MessageCenter* message_center,
-                      TrayPower::NotificationState notification_state);
-  ~BatteryNotification();
-
-  // Updates the notification if it still exists.
-  void Update(TrayPower::NotificationState notification_state);
-
- private:
-  message_center::MessageCenter* message_center_;
-
-  DISALLOW_COPY_AND_ASSIGN(BatteryNotification);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_CHROMEOS_POWER_BATTERY_NOTIFICATION_H_