Also refactor TransportFeedback to use this. BUG= Review URL: https://codereview.webrtc.org/1307663004 Cr-Commit-Position: refs/heads/master@{#9935}
Also refactor TransportFeedback to use this. BUG= Review URL: https://codereview.webrtc.org/1307663004 Cr-Commit-Position: refs/heads/master@{#9935}