Oilpan: move BatteryStatus to the heap.

Source/modules/battery/BatteryStatus.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 BatteryStatus_h
 #define BatteryStatus_h
 
+#include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class BatteryStatus : public RefCounted<BatteryStatus> {
+class BatteryStatus FINAL : public RefCountedWillBeGarbageCollected<BatteryStatus> {
 public:
-    static PassRefPtr<BatteryStatus> create();
-    static PassRefPtr<BatteryStatus> create(bool charging, double chargingTime, double dischargingTime, double level);
+    static PassRefPtrWillBeRawPtr<BatteryStatus> create();
+    static PassRefPtrWillBeRawPtr<BatteryStatus> create(bool charging, double chargingTime, double dischargingTime, double level);
 
     bool charging() const { return m_charging; }
     double chargingTime() const  { return m_chargingTime; }
     double dischargingTime() const  { return m_dischargingTime; }
     double level() const  { return m_level; }
 
+    void trace(Visitor*) { }
+
 private:
     BatteryStatus();
     BatteryStatus(bool charging, double chargingTime, double dischargingTime, double level);
 
     bool m_charging;
     double m_chargingTime;
     double m_dischargingTime;
     double m_level;
 };
 
 } // namespace WebCore
 
 #endif // BatteryStatus_h
-