TaskQueuePacedSender::MaybeUpdateStats() is intended to be called when
packets are sent or by a sequence of "scheduled" calls. There should
only be one scheduled call in flight at a time - and that one
reschedules itself if needed when it runs.
A bug however caused the "schedules task in flight" flag to
incorrectly be set to false, leading to more and more schedules tasks
being alive - eating CPU cycles.
This CL fixes that and also makes sure the queue time properly goes
down to zero before the next idle interval check, even if there are no
more packets to send.
Bug: webrtc:10809
Change-Id: I4e13fcf95619a43dcaf0ed38bce9684a5b0d8d5e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176330
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31390}
998524a08e