BUG=angleproject:1354

Change-Id: Ic71392555ae4212c4144bc67d7c5e53874af4d53
Reviewed-on: https://chromium-review.googlesource.com/398198Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>