This is used by BBR which is introduced in a future CL. Bug: webrtc:8415 Change-Id: Ie5b3e6e58b7c9c7a35fc21acb636103d7f5daec3 Reviewed-on: https://webrtc-review.googlesource.com/64920 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22643}