BUG=angleproject:883

Change-Id: If5616bf24c1ac5477ae80cf1d25efa70b62edea1
Reviewed-on: https://chromium-review.googlesource.com/268750Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>