GitLab

If hammerd detects that the attached detachable base needs a frimware
update (which is applied on device boot), show the user a system
notification asking them to reboot the device in order to apply the
update.
The notification is closed if the update succeeds, or if the detachable
base gets detached (i.e. the Chrome OS device switches to tablet mode).

Note that, unlike detachable base switch notification, this notification
should be shown on login and lock screen (because login and lock UI do
not display error bubbles in this case), and is thus set as a system
priority notification.

BUG=765416

Change-Id: Ie8d5d30985aab4d0d85e3b35ebb147d212f92658
Reviewed-on: https://chromium-review.googlesource.com/957468
Commit-Queue: Toni Barzic <tbarzic@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543113}