this is the one from https://developers.google.com/talk/libjingle/important_concepts#candidates BUG=webrtc:10998 Change-Id: Ifb998e117859d8fd7d5569f9b7913627e375d989 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172580 Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30958}