BUG=chromium:752423
R=mtrofin@chromium.org,bradnelson@chromium.org

Change-Id: Ie6d80a82cd40b598e917a79842e6639e73be9194
Reviewed-on: https://chromium-review.googlesource.com/606587Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47251}