Interface provides a way for a geolocation provider to
 notify the system that a new location is available.
[scriptable, uuid(b89d7227-9f04-4236-a582-25a3f2779d72)]
interface nsIGeolocationUpdate : nsISupports

Methods

 Notify the geolocation service that a new geolocation
 has been discovered.
 This must be called on the main thread
void update(in nsIDOMGeoPosition position)