This is in preparation of an upcoming CL that will propagate this
information through the TransportFeedbackAdapter.
Bug: webrtc:10932
Change-Id: Ic2a026b5ef72d6bf01e698e7634864fedc659b4e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168220
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30476}