This prepares for upcoming CL using the value for more than controlling pacing rates. Bug: webrtc:9887 Change-Id: Id3891c3727865149b87f946b3e7c3095a6ac9f26 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126001 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Jonas Olsson <jonasolsson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27004}