This test flakes on many platforms.

BUG=angleproject:2408
BUG=angleproject:2407

Change-Id: I9e8ff8aedc02962656c1a336c3f34191920ae8c7
Reviewed-on: https://chromium-review.googlesource.com/c/1352222
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>