01a36f32e7
When a Send is in progress, don't allow modification to the list of callbacks, or a recursive Send. Bug: webrtc:11943 Change-Id: I88751060136972d0c9170db725fa30312a14b5b1 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/192360 Commit-Queue: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Markus Handell <handellm@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32584}