Oilpan: Allocate all EventTarget derived types on the manged heap.

Source/modules/battery/BatteryManager.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 BatteryManager_h
 #define BatteryManager_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/Document.h"
 #include "core/frame/DeviceSensorEventController.h"
 #include "modules/EventTargetModules.h"
 #include "platform/heap/Handle.h"
 
 namespace WebCore {
 
 class Navigator;
 
 class BatteryManager FINAL : public RefCountedWillBeRefCountedGarbageCollected<BatteryManager>, public ActiveDOMObject, public DeviceSensorEventController, public EventTargetWithInlineData {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<BatteryManager>);
+    REFCOUNTED_EVENT_TARGET(BatteryManager);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BatteryManager);
 public:
     virtual ~BatteryManager();
     static PassRefPtrWillBeRawPtr<BatteryManager> create(ExecutionContext*);
 
     // EventTarget implementation.
     virtual const WTF::AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::BatteryManager; }
     virtual ExecutionContext* executionContext() const OVERRIDE { return ContextLifecycleObserver::executionContext(); }
 
     bool charging();
     double chargingTime();
@@ skipping 14 matching lines @@
     virtual void stop() OVERRIDE;
 
     // DeviceSensorEventController
     virtual void registerWithDispatcher() OVERRIDE;
     virtual void unregisterWithDispatcher() OVERRIDE;
     virtual bool hasLastData() OVERRIDE;
     virtual PassRefPtrWillBeRawPtr<Event> getLastEvent() OVERRIDE;
     virtual bool isNullEvent(Event*) OVERRIDE;
     virtual Document* document() OVERRIDE;
 
-    void trace(Visitor*) { }
-
 private:
     explicit BatteryManager(ExecutionContext*);
 };
 
 }
 
 #endif // BatteryManager_h