Harald Alvestrand 6f170a05dc Convert P2PtransportChannel.GatheringState to CallbackList
Earlier attempts have shown that this signal is multiply listened to.

Bug: webrtc:11943
Change-Id: I382df9a554925d214872d788c5d7a36f2f7c7b7e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/348661
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42139}
2024-04-22 12:29:56 +00:00
..
2024-03-12 10:57:56 +00:00