5fc59e810b
Nack bitrate allocation should not be done on a per-rtp-module basis, but rather shared bitrate pool per call. This CL moves allocation to the pacer and cleans up a bunch if bitrate stats handling. BUG= R=danilchap@webrtc.org, stefan@webrtc.org, tommi@webrtc.org Review URL: https://codereview.webrtc.org/2061423003 . Cr-Commit-Position: refs/heads/master@{#13416}