Move mediastream module to oilpan transition types

Source/modules/mediastream/RTCDataChannelEvent.cpp

Index: Source/modules/mediastream/RTCDataChannelEvent.cpp
diff --git a/Source/modules/mediastream/RTCDataChannelEvent.cpp b/Source/modules/mediastream/RTCDataChannelEvent.cpp
index 1608182ecb3542714207ab4fc93a729c63f4205a..8ca3fddfa4e360ff03c7cfa80f4c90dbcc419c47 100644
--- a/Source/modules/mediastream/RTCDataChannelEvent.cpp
+++ b/Source/modules/mediastream/RTCDataChannelEvent.cpp
@@ -32,7 +32,7 @@ PassRefPtrWillBeRawPtr<RTCDataChannelEvent> RTCDataChannelEvent::create()
     return adoptRefWillBeNoop(new RTCDataChannelEvent);
 }
 
-PassRefPtrWillBeRawPtr<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
+PassRefPtrWillBeRawPtr<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel> channel)
 {
     return adoptRefWillBeNoop(new RTCDataChannelEvent(type, canBubble, cancelable, channel));
 }
@@ -43,7 +43,7 @@ RTCDataChannelEvent::RTCDataChannelEvent()
     ScriptWrappable::init(this);
 }
 
-RTCDataChannelEvent::RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
+RTCDataChannelEvent::RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel> channel)
     : Event(type, canBubble, cancelable)
     , m_channel(channel)
 {
@@ -66,6 +66,7 @@ const AtomicString& RTCDataChannelEvent::interfaceName() const
 
 void RTCDataChannelEvent::trace(Visitor* visitor)
 {
+    visitor->trace(m_channel);
     Event::trace(visitor);
 }