BUG=angleproject:890

Change-Id: I66fb7b97ea3f09d40ba25a769c8bc7fe04527805
Reviewed-on: https://chromium-review.googlesource.com/275307Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>