This seems to have no effect on tests, so it appears that these were not used after all. The goal is to make transport-cc a media-section-level attribute. Bug: webrtc:378698658 Change-Id: Ia20ca5b91472b02db30f911ad1a1892cf36cd682 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/368440 Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43411}