This interface is intended to only handle packet-sending parts of the paced sender. See https://webrtc-review.googlesource.com/c/src/+/145212 for context Bug: webrtc:10809 Change-Id: I93f0b40e1865665c2d436db67021350a0ed0687b Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/145216 Commit-Queue: Erik Språng <sprang@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28662}