BUG=angleproject:1004

Change-Id: Ide2f71f1aee70d0d962ff275ac9bd0f852b218ac
Reviewed-on: https://chromium-review.googlesource.com/271482Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>