BUG=angleproject:959

Change-Id: Ie08e68ae27372a97bd118e61478201b0d3dad955
Reviewed-on: https://chromium-review.googlesource.com/262337Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nicolas Capens <capn@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>