Which Chromite branch should be updated (Leave blank for "master")?
master

Reason for restart (including CL link if possible):
https://chromium-review.googlesource.com/#/c/340802/

Cc any users you'd like notified of the restart.

TROOPERS: please issue restart within a restart window (go/chrome-infra-cros-restart-windows).

For more information, see go/chrome-infra-doc-cros.)