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

Source/modules/mediastream/RTCDTMFSender.cpp

Index: Source/modules/mediastream/RTCDTMFSender.cpp
diff --git a/Source/modules/mediastream/RTCDTMFSender.cpp b/Source/modules/mediastream/RTCDTMFSender.cpp
index 865c58d8730d8bacefdef5da3a38670f39ec5e48..7759f1075e0eff6d9c2f32e185d279d132f0df5e 100644
--- a/Source/modules/mediastream/RTCDTMFSender.cpp
+++ b/Source/modules/mediastream/RTCDTMFSender.cpp
@@ -145,7 +145,7 @@ void RTCDTMFSender::stop()
     m_handler->setClient(0);
 }
 
-void RTCDTMFSender::scheduleDispatchEvent(PassRefPtr<Event> event)
+void RTCDTMFSender::scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
     m_scheduledEvents.append(event);
 
@@ -158,10 +158,10 @@ void RTCDTMFSender::scheduledEventTimerFired(Timer<RTCDTMFSender>*)
     if (m_stopped)
         return;
 
-    Vector<RefPtr<Event> > events;
+    WillBeHeapVector<RefPtrWillBeMember<Event> > events;
     events.swap(m_scheduledEvents);
 
-    Vector<RefPtr<Event> >::iterator it = events.begin();
+    WillBeHeapVector<RefPtrWillBeMember<Event> >::iterator it = events.begin();
     for (; it != events.end(); ++it)
         dispatchEvent((*it).release());
 }