This is one step in getting rid of cricket::MediaType. Bug: webrtc:12754 Fixes: webrtc:12764 Change-Id: Idee832572bdc4c0e3bfdec6fb31ec0ba9db3e995 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/218346 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33994}