R=titzer@chromium.org

Change-Id: I6c817fa82333ca12d2d8f9f8704eac157f3caa9f
Reviewed-on: https://chromium-review.googlesource.com/1184705Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55291}