BUG=angleproject:956

Change-Id: I853f3cf3171b85143e490ef9678aae7d38de0b1f
Reviewed-on: https://chromium-review.googlesource.com/262778Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>