BUG=angleproject:892

Change-Id: I1ef1bd0ce60f4585e473f9750c748a1b41c09da2
Reviewed-on: https://chromium-review.googlesource.com/269741Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>