Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/modules/device_orientation/DeviceMotionController.cpp

 /*
  * Copyright 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
@@ skipping 54 matching lines @@
         DocumentSupplement::provideTo(document, supplementName(), adoptPtr(controller));
     }
     return *controller;
 }
 
 bool DeviceMotionController::hasLastData()
 {
     return DeviceMotionDispatcher::instance().latestDeviceMotionData();
 }
 
-PassRefPtr<Event> DeviceMotionController::getLastEvent()
+PassRefPtrWillBeRawPtr<Event> DeviceMotionController::getLastEvent()
 {
     return DeviceMotionEvent::create(EventTypeNames::devicemotion, DeviceMotionDispatcher::instance().latestDeviceMotionData());
 }
 
 void DeviceMotionController::registerWithDispatcher()
 {
     DeviceMotionDispatcher::instance().addDeviceMotionController(this);
 }
 
 void DeviceMotionController::unregisterWithDispatcher()
@@ skipping 24 matching lines @@
     }
 }
 
 void DeviceMotionController::didRemoveAllEventListeners(DOMWindow*)
 {
     stopUpdating();
     m_hasEventListener = false;
 }
 
 } // namespace WebCore