BUG=angleproject:2121

Change-Id: Ie7d09aca453753577dd26dcd35b1c743dbfcfce2
Reviewed-on: https://chromium-review.googlesource.com/598495
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>