BUG=angleproject:888

Change-Id: Ie811266ed1cb08d29344fb11cd9afe77f9587cd7
Reviewed-on: https://chromium-review.googlesource.com/263654Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>