BUG=angleproject:2188

Change-Id: Ia23b54044a85435c761478bceeb9aac961fac0d1
Reviewed-on: https://chromium-review.googlesource.com/783230Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>