BUG=angleproject:891

Change-Id: Ib7d16a9266fe23fb9374cec94f3baa4ad135c0d3
Reviewed-on: https://chromium-review.googlesource.com/302333Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>