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

Source/modules/mediastream/RTCDataChannel.cpp

Index: Source/modules/mediastream/RTCDataChannel.cpp
diff --git a/Source/modules/mediastream/RTCDataChannel.cpp b/Source/modules/mediastream/RTCDataChannel.cpp
index c6b69c87a3c892b4999a60e48cb108ba2d85951b..a40434c5c273f0eaadfdacecb6b339f69dadb1cc 100644
--- a/Source/modules/mediastream/RTCDataChannel.cpp
+++ b/Source/modules/mediastream/RTCDataChannel.cpp
@@ -291,7 +291,7 @@ void RTCDataChannel::stop()
     m_executionContext = 0;
 }
 
-void RTCDataChannel::scheduleDispatchEvent(PassRefPtr<Event> event)
+void RTCDataChannel::scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
     m_scheduledEvents.append(event);
 
@@ -304,10 +304,10 @@ void RTCDataChannel::scheduledEventTimerFired(Timer<RTCDataChannel>*)
     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());