Code review comment for lp:~andreas-pokorny/mir/move-config-changer-to-input-thread

> > + std::weak_ptr<InputDeviceHub> hub;
>
> Seems this is not needed anymore?

oh right..

>
> > + auto observer = obs.lock();
>
> Probably needs a validity check, unless there is an implied validity guarantee
> I am not aware of.

Hm only that nothing happens if the validity check fails..