GitLab

Sheriffs: if WebRtcBrowserTest.CanSetupVideoCallAndDisableLocalVideo
flakes, revert this patch. It shouldn't flake after this fix.

Instead of looking at color values of individual pixels, see if we can
get more reliable results by looking at luma values instead. This way
we can detect black frames more reliably in the tests.

This is a partial re-land of codereview.chromium.org/1108803002.

This is essentially the black frame algorithm used in testrtc.

BUG=477498

Review URL: https://codereview.chromium.org/1132333006

Cr-Commit-Position: refs/heads/master@{#330539}