BUG=angleproject:1087

Change-Id: Ibd0918f29b65c509e749953059d584ea83776a31
Reviewed-on: https://chromium-review.googlesource.com/303775Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>