Bug 1208371 - Track original track in MediaStreamTrack clones. r=jib

MozReview-Commit-ID: HycPCeI2v3U

--HG--
extra : rebase_source : 304bd198259c6e793d6bba9b02221e684ab16c5c

dom/media/MediaStreamTrack.cpp

@@ -47,7 +47,7 @@ MediaStreamTrack::~MediaStreamTrack()
 }
 
 NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaStreamTrack, DOMEventTargetHelper,
-                                   mOwningStream)
+                                   mOwningStream, mOriginalTrack)
 
 NS_IMPL_ADDREF_INHERITED(MediaStreamTrack, DOMEventTargetHelper)
 NS_IMPL_RELEASE_INHERITED(MediaStreamTrack, DOMEventTargetHelper)

dom/media/MediaStreamTrack.h

@@ -74,6 +74,7 @@ protected:
 
   RefPtr<DOMMediaStream> mOwningStream;
   TrackID mTrackID;
+  RefPtr<MediaStreamTrack> mOriginalTrack;
   nsString mID;
   nsString mLabel;
   bool mEnded;