[webrtc-pc] new commits pushed by aboba

The following commits were just pushed by aboba to https://github.com/w3c/webrtc-pc:

* Remove space before commas
  by Philip Jägenstedt
https://github.com/w3c/webrtc-pc/commit/7ac5b680b42e823f0ff5ae42dd8589544b0cc8a7

* Merge pull request #1144 from foolip/commas

Remove space before commas
  by Bernard Aboba
https://github.com/w3c/webrtc-pc/commit/0037802eb1971ad6cd43896b23aaca5360b467a4