Disable MESA_framebuffer_flip_y extension

The extension is not WebGL 2.0 compliant yet.

BUG=964010

Change-Id: I7c89e79d534ad16baba64215e9827558084d2423
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1620085
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Fritz Koenig <frkoenig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661487}
1 file changed