WebRTC prototype: https://webrtc-review.googlesource.com/c/src/+/158520 Bug: webrtc:10739 Change-Id: I07b7a60602b41dc04292a91923e878a8d753486f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161732 Reviewed-by: Minyue Li <minyue@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Ruslan Burakov <kuddai@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30335}