[scheduler] Add a CHECK for renderer main thread load metrics.
Change DCHECK to CHECK in RendererScheduler's
Report{Foreground,Background}RendererThreadLoad. This should help pin
down strange anomalies from metrics.
This patch should be Canary-channel only, and expected to be extremely
rare (less than 1 failure/day on Canary). Please revert without asking
if something goes wrong.
BUG=693542
Review-Url: https://codereview.chromium.org/2720023003
Cr-Commit-Position: refs/heads/master@{#453783}
1 file changed
