BUG=angleproject:889

Change-Id: I347ac21cfd0a56654a75fb41ac24c6c67ede3a05
Reviewed-on: https://chromium-review.googlesource.com/302351Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tryjob-Request: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>