BUG=angleproject:1987

Change-Id: I189e1606bd966eb369e8192a6866c8e90810e937
Reviewed-on: https://chromium-review.googlesource.com/802956
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>