GitLab

ui::ThroughputTracker provides a more accurate smoothness tracking
than ash::FpsCounter. Re-wire the start/stop smoothness tracking
api using that.

Bug: 1062124
Change-Id: I7472593810e2dc2151059e16656041cb1a7a72d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2226278Reviewed-by: Jun Mukai <mukai@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775177}