Bug 92811 – [Chromium] compositing/video-page-visibility.html needs reworking to be deterministic

• Status: RESOLVED
• Resolution: WONTFIX
• Component: Layout and Rendering

[Peter Kasting]

A description of compositing/video-page-visibility.html from jamesr:

"That test is (effectively) a repaint test.  The way repaint tests work is, on each paint we basically draw a 50% opaque gray rectangle over the whole viewport, then paint the rect(s) that were invalidated since the last paint at 100% alpha.  On this test, we do a bunch of paints with no damage, so you see the first paint at 1/2^N alpha, where N is the number of repaints.

"Unfortunately, on this test I don't think we care at all about N, and I think N isn't entirely stable.  File a new bug to rework the test -- in its current form it isn't telling us anything except that we aren't hitting any ASSERTs (which is somewhat useful)."

[Stephen Chenney]

https://code.google.com/p/chromium/issues/detail?id=231357