Add setBatteryListener into Platform.

Source/modules/battery/BatteryDispatcher.h

 // Copyright 2014 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 BatteryDispatcher_h
 #define BatteryDispatcher_h
 
 #include "core/frame/DeviceSensorEventDispatcher.h"
 #include "modules/battery/BatteryManager.h"
 #include "modules/battery/BatteryStatus.h"
-#include "public/platform/WebBatteryListener.h"
+#include "public/platform/WebBatteryStatusListener.h"
 
 namespace blink {
 class WebBatteryStatus;
 }
 
 namespace WebCore {
 
-class BatteryDispatcher FINAL : public DeviceSensorEventDispatcher, public blink::WebBatteryListener {
+class BatteryDispatcher FINAL : public DeviceSensorEventDispatcher, public blink::WebBatteryStatusListener {
 public:
     static BatteryDispatcher& instance();
     virtual ~BatteryDispatcher();
 
     void addClient(BatteryManager*);
     void removeClient(BatteryManager*);
 
     const BatteryStatus* getLatestData();
     virtual void updateBatteryStatus(const blink::WebBatteryStatus&) OVERRIDE;
 
 private:
     BatteryDispatcher();
 
     void didChangeBatteryStatus(const AtomicString& eventType);
 
     virtual void startListening() OVERRIDE;
     virtual void stopListening() OVERRIDE;
 
     RefPtr<BatteryStatus> m_batteryStatus;
 };
 
 }
 
 #endif // BatteryDispatcher_h