Move mediastream module to oilpan transition types

Source/modules/mediastream/RTCDataChannelEvent.h

Index: Source/modules/mediastream/RTCDataChannelEvent.h
diff --git a/Source/modules/mediastream/RTCDataChannelEvent.h b/Source/modules/mediastream/RTCDataChannelEvent.h
index f34d1c4868cb2048093dc1223b33120f3eb476eb..29d6b3ad9a1e2d733138fcd0b831e60964fd79da 100644
--- a/Source/modules/mediastream/RTCDataChannelEvent.h
+++ b/Source/modules/mediastream/RTCDataChannelEvent.h
@@ -36,7 +36,7 @@ public:
     virtual ~RTCDataChannelEvent();
 
     static PassRefPtr<RTCDataChannelEvent> create();
-    static PassRefPtr<RTCDataChannelEvent> create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel>);
+    static PassRefPtr<RTCDataChannelEvent> create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel>);
 
     RTCDataChannel* channel() const;
 
@@ -46,9 +46,9 @@ public:
 
 private:
     RTCDataChannelEvent();
-    RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel>);
+    RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel>);
 
-    RefPtr<RTCDataChannel> m_channel;
+    RefPtrWillBePersistent<RTCDataChannel> m_channel;
 };
 
 } // namespace WebCore