BUG=angleproject:891

Change-Id: If8aefa4a37ba7d1b6b08921bee61463bb20550af
Reviewed-on: https://chromium-review.googlesource.com/285834Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>