commit 9089c0d814b11739a7e323c6a9cb03bfad149ea8
author Florent Castelli <orphis@webrtc.org> Wed Mar 15 15:47:43 2023
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> Fri Mar 17 09:50:44 2023
tree 450b7157dd7ff9e22d856d17b11fb76ed90c407f
parent b6b9b1fc761c039195faa033cb8fdde4ed8ba0a9

[Merge-111] Preserve mid of sections added with AddTrack after a rollback

Since AddTrack now has an implicit init_encodings value, it will also
have a StableState saved when associating a transceiver.
That state may not have a saved mid and mline_index, and so on a
rollback, it could blindly reset the mid and mline_index of an
associated transceiver.

This is wrong, the mid and mline_index of associated transceivers
should only be updated when the StableState objects actually
have one saved.

# Try bots not possible due to
# https://webrtc-review.googlesource.com/c/src/+/292820
NOTRY=True

(cherry picked from commit b3d424cd484dd7a109547ca7be7f1575a29df7e7)

Bug: chromium:1424238
Change-Id: I8e80a04cd072d90200ca7643de892c0ef29b1f1a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/297920
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Cr-Original-Commit-Position: refs/heads/main@{#39577}
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/297984
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/branch-heads/5563@{#5}
Cr-Branched-From: 6c032cb8356b0d3f717c4fcf50796241f2bba6c2-refs/heads/main@{#39207}