GitLab

When Tick() returns false, it means there is no need to call tick
further. This commit changes chromium to only call tick when there
is polling work to be done.

Bug: dawn:119
Bug: chromium:940985
Change-Id: I792837b83f4d0da1d478e3876c9a2af8b1505c2c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485037
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826740}