Bug 1296531 - Don't notify of queued data after a track ended. r=jesup

This could confuse listeners, since non-direct listeners would see more
data than their direct counterparts.

MozReview-Commit-ID: FC5rukQtrKL

--HG--
extra : rebase_source : e60ad42fe84867c5737d44629a1a5ca60398906c

dom/media/TrackUnionStream.cpp

@@ -311,6 +311,7 @@ TrackUnionStream::TrackUnionStream()
           aInputTrack->GetEnd() <= inputEnd) {
         inputTrackEndPoint = aInputTrack->GetEnd();
         *aOutputTrackFinished = true;
+        break;
       }
 
       if (interval.mStart >= interval.mEnd) {
@@ -322,7 +323,6 @@ TrackUnionStream::TrackUnionStream()
       StreamTime outputStart = outputTrack->GetEnd();
 
       if (interval.mInputIsBlocked) {
-        // Maybe the input track ended?
         segment->AppendNullData(ticks);
         STREAM_LOG(LogLevel::Verbose, ("TrackUnionStream %p appending %lld ticks of null data to track %d",
                    this, (long long)ticks, outputTrack->GetID()));