BUG=angleproject:521

Change-Id: I50858193518b4d07edcb2073caaa99ce37fcc4c3
Reviewed-on: https://chromium-review.googlesource.com/267000Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>