BUG=angleproject:546

Change-Id: If44d808e30e4c5b15971fe44e8c59a3c9f19095f
Reviewed-on: https://chromium-review.googlesource.com/267837Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>