Comment 9 for bug 1480200

It's all we have atm. I could imagine it as a timer api but it would probably require better precision (it's off up to 5 seconds in some cases atm) and some other fixes (like calling back the originating app on clicking the notification, instead of the clock app). Also it has the side effect that such timers will show up as alarms in the datetime indicator and iirc the clock app. Both of them are probably questions for design. On the other hand, a proper timer api could offer better features I think. Depends if we want to allow, e.g. focusing/resuming the app when the timer is due so other things could be done instead of just ringing a notification.