BUG=chromium:801604
R=bbudge@chromium.org,titzer@chromium.org

Change-Id: I5fa57d5f8ea288d7aef7d466cbf11df46c4dcd1d
Reviewed-on: https://chromium-review.googlesource.com/869468Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50665}