GitLab

This change introduces a notification that will be displayed when a
user plugs in a USB printer that requires manual configuration. Clicking
the notification will open CrOS settings so the user can manually
configure the printer.
- Subsequent CL will call ShowConfigurationNotification() to show the
notification.

Bug: 951139
Change-Id: Ibff4d415de9c3ccf8eda45f470cfa30513468bb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1606193Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661038}