R=titzer@chromium.org

Change-Id: I7c467adaff73ed0d3836edfeac435e5065d99892
Reviewed-on: https://chromium-review.googlesource.com/983774Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52302}