https://w3c.github.io/webrtc-pc/#dfn-create-an-rtcrtpsender
has a step saying
For each stream in streams, add stream.id to
[[AssociatedMediaStreamIds]] if it's not already there
This applies to addTrack and setStreams and the set of streams in
addTransceiver.
Tests that default to the stream id as sync group add
"-sync" as a postfix
BUG=webrtc:14769
Change-Id: I806d2fd87a98d50e54709755541f3f1efff1d8ab
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/288701
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38942}
e04c397099