Add battery status to settings row in uber tray bubble.

ash/system/power/tray_power.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_SYSTEM_POWER_TRAY_POWER_H_
 #define ASH_SYSTEM_POWER_TRAY_POWER_H_
 #pragma once
 
 #include "ash/system/power/power_status_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 
+class SkBitmap;
+
+namespace gfx {
+class ImageSkia;
+}
+
 namespace ash {
 namespace internal {
 
 namespace tray {
 class PowerNotificationView;
 class PowerTrayView;
 }
 
+enum IconSet {
+  ICON_LIGHT,
+  ICON_DARK
+};
+
 class TrayPower : public SystemTrayItem,
                   public PowerStatusObserver {
  public:
   TrayPower();
   virtual ~TrayPower();
 
+  static gfx::ImageSkia GetBatteryImage(const PowerSupplyStatus& supply_status,
+                                        IconSet icon_set);
+
  private:
   enum NotificationState {
     NOTIFICATION_NONE,
     NOTIFICATION_LOW_POWER,
     NOTIFICATION_CRITICAL
   };
 
   // Overridden from SystemTrayItem.
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
@@ skipping 14 matching lines @@
   tray::PowerNotificationView* notification_view_;
   NotificationState notification_state_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayPower);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_POWER_TRAY_POWER_H_