stefan ba4c0e45ff Add send-side BWE to WebRtcVoiceEngine under a finch experiment.
This adds negotiation of both transport sequence number and transport
feedback. Only offers transport seq num if the
WebRTC-Audio-SendSideBwe finch experiment is enabled.

TBR=mflodman@webrtc.org
BUG=webrtc:5263

Review URL: https://codereview.webrtc.org/1604563002

Cr-Commit-Position: refs/heads/master@{#11487}
2016-02-04 12:12:31 +00:00
..