Bug 1271669 - Clean up some stream-centered code in MediaPipelineFactory. r=bwc

MozReview-Commit-ID: 8esaZmy7HVO

--HG--
extra : rebase_source : b98d20380596e3b14c00034ca38b5ff82ff11320
extra : histedit_source : 5e5dcbce95878404f743b142a075c601a4f46f24

media/webrtc/signaling/src/peerconnection/MediaPipelineFactory.cpp

@@ -867,7 +867,7 @@ MediaPipelineFactory::ConfigureVideoCodecMode(const JsepTrack& aTrack,
 {
 #if !defined(MOZILLA_EXTERNAL_LINKAGE)
   RefPtr<LocalSourceStreamInfo> stream =
-    mPCMedia->GetLocalStreamById(aTrack.GetStreamId());
+    mPCMedia->GetLocalStreamByTrackId(aTrack.GetTrackId());
 
   //get video track
   RefPtr<mozilla::dom::VideoStreamTrack> videotrack =
@@ -878,15 +878,6 @@ MediaPipelineFactory::ConfigureVideoCodecMode(const JsepTrack& aTrack,
     return NS_ERROR_FAILURE;
   }
 
-  //get video source type
-  RefPtr<DOMMediaStream> mediastream =
-    mPCMedia->GetLocalStreamById(aTrack.GetStreamId())->GetMediaStream();
-
-  DOMLocalMediaStream* domLocalStream = mediastream->AsDOMLocalMediaStream();
-  if (!domLocalStream) {
-    return NS_OK;
-  }
-
   dom::MediaSourceEnum source = videotrack->GetSource().GetMediaSource();
   webrtc::VideoCodecMode mode = webrtc::kRealtimeVideo;
   switch (source) {