R=titzer@chromium.org

Change-Id: I6eabacf07e3dd95d1bec68f1980ec6aae5220c97
Reviewed-on: https://chromium-review.googlesource.com/1238926Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56188}