Oilpan: Enable oilpan for callback classes

Source/modules/mediastream/MediaStreamTrack.cpp

Index: Source/modules/mediastream/MediaStreamTrack.cpp
diff --git a/Source/modules/mediastream/MediaStreamTrack.cpp b/Source/modules/mediastream/MediaStreamTrack.cpp
index 3843cb86e7615a66831266d37d31001d8003401d..263abef05a39426776a2fc5e7c5c7cb77d1002d7 100644
--- a/Source/modules/mediastream/MediaStreamTrack.cpp
+++ b/Source/modules/mediastream/MediaStreamTrack.cpp
@@ -128,7 +128,7 @@ String MediaStreamTrack::readyState() const
     return String();
 }
 
-void MediaStreamTrack::getSources(ExecutionContext* context, PassOwnPtrWillBeRawPtr<MediaStreamTrackSourcesCallback> callback, ExceptionState& exceptionState)
+void MediaStreamTrack::getSources(ExecutionContext* context, MediaStreamTrackSourcesCallback* callback, ExceptionState& exceptionState)
 {
     LocalFrame* frame = toDocument(context)->frame();
     UserMediaController* userMedia = UserMediaController::from(frame);