R=titzer@chromium.org

Change-Id: Iefa0c90f572acbf4cdc3fc4c4f046a760fb59df9
Reviewed-on: https://chromium-review.googlesource.com/857197Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50450}