This is part of a series of CLs preparing to remove SendSideCongestionController as a separate class. Bug: webrtc:9586 Change-Id: I0dabd00793e7b436a679d2ef695d2e557a35ae87 Reviewed-on: https://webrtc-review.googlesource.com/c/105420 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Björn Terelius <terelius@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25178}