Fixing scenario where track is rejected and later un-rejected.

talk/app/webrtc/mediastreamsignaling.h

Index: talk/app/webrtc/mediastreamsignaling.h
diff --git a/talk/app/webrtc/mediastreamsignaling.h b/talk/app/webrtc/mediastreamsignaling.h
index 87eede6305d26ad1956b74a7f3808e430b1e800b..fc50f46360fc216b3efd2d79929a9da7a8289fc4 100644
--- a/talk/app/webrtc/mediastreamsignaling.h
+++ b/talk/app/webrtc/mediastreamsignaling.h
@@ -327,6 +327,12 @@ class MediaStreamSignaling : public sigslot::has_slots<> {
   // tracks of type |media_type|.
   void RejectRemoteTracks(cricket::MediaType media_type);
 
+  // Set the MediaStreamTrackInterface::TrackState to |kLive| on all remote
+  // tracks of type |media_type|.
+  // Needed in case the local description caused the track to be rejected,
+  // then later accepted, without being destroyed.
+  void AcceptRemoteTracks(cricket::MediaType media_type);
+
   // Finds remote MediaStreams without any tracks and removes them from
   // |remote_streams_| and notifies the observer that the MediaStream no longer
   // exist.