The implicit rollback of local description is part of perfect negotiation: https://groups.google.com/a/chromium.org/g/blink-dev/c/OqPfCpC5RYU Bug: None Change-Id: I144d9ef86adad0def81ab6c58ff997cd19b562da Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212080 Reviewed-by: Kári Helgason <kthelgason@webrtc.org> Commit-Queue: Kári Helgason <kthelgason@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33487}