BUG=angleproject:2188

Change-Id: Icbe78f645b693a5b2ef555feffda0f618209e867
Reviewed-on: https://chromium-review.googlesource.com/757092
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Luc Ferron <lucferron@chromium.org>