BUG=angleproject:953

Change-Id: Ib9e45fab1d35f8c78abd0ac2209ac4f63afe4465
Reviewed-on: https://chromium-review.googlesource.com/261170Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>