BUG=angleproject:1639

Change-Id: I03a0950f26557983c8dc816a27cb4038c60e5755
Reviewed-on: https://chromium-review.googlesource.com/415611Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>