Andreas Pehrson 937747498a Bug 1170958 - Refactor DOMMediaStream to contain a 3-stage track chain. r=roc
This lets us separate tracks by ownership like so:
* Input    - Owned by the producer of the DOMMediaStream (gUM etc.)
* Owned    - Contains Input tracks (per above) or tracks cloned tracks
             if this DOMMediaStream is a clone.
* Playback - Contains Owned tracks plus tracks addTrack()ed to this
             DOMMediaStream minus tracks removeTrack()ed from this
             DOMMediaStream.

--HG--
extra : commitid : GPSNwBVyD4j
extra : rebase_source : fba22e96c6c65a74e012509f3da67a4d7df7a244
2015-09-30 09:31:54 +08:00
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