Using unit types improves readability and some conversion in PacedSender
can be removed.
TimeUntilNextProbe() is replaced by NextProbeTime(), so returning an
absolute time rather than a delta. This fits better with the upcoming
TaskQueue based pacer, and is also what is already stored internally
in BitrateProber.
Bug: webrtc:10809
Change-Id: I5a4e289d2b53e99d3c0a2f4b36a966dba759d5cf
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158743
Commit-Queue: Erik Språng <sprang@webrtc.org>
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29670}