webrtc: remove track parsing assertion from setRemoteDescription/msid test removes the assertion that the track id in ontrack comes from the SDP. While that is still true for this test, it is not for others. See https://github.com/w3c/webrtc-pc/issues/1128 
diff --git a/webrtc/RTCPeerConnection-setRemoteDescription.html b/webrtc/RTCPeerConnection-setRemoteDescription.html index 109016f..dc0542e 100644 --- a/webrtc/RTCPeerConnection-setRemoteDescription.html +++ b/webrtc/RTCPeerConnection-setRemoteDescription.html 
@@ -10,7 +10,7 @@  <script src="/resources/testharnessreport.js"></script>  <script type="text/javascript">  // tests that ontrack is called and parses the msid information from the SDP and creates - // the streams and tracks with matching identifiers. + // the streams with matching identifiers.  async_test(function(test) {  const sdp = 'v=0\r\n' +  'o=- 166855176514521964 2 IN IP4 127.0.0.1\r\n' + @@ -34,9 +34,6 @@  var pc = new RTCPeerConnection(null);    pc.ontrack = test.step_func(function(event) { - assert_equals(event.track.kind, 'audio', 'ontrack fires with an audio track'); - assert_equals(event.track.id, 'track1', 'the track name is parsed from the MSID line'); -  assert_equals(event.streams.length, 1, 'the track belongs to one MediaStream');  assert_equals(event.streams[0].id, 'stream1', 'the stream name is parsed from the MSID line');  test.done(); @@ -46,7 +43,7 @@  .catch(test.step_func(function(e) {  assert_unreached('Error ' + e.name + ': ' + e.message);  })); - }, 'Triggers ontrack when called with a remote description and the MSID is parsed.'); + }, 'Triggers ontrack when called with a remote description and the MSID of the stream is is parsed.');  </script>    </body>