singleShot() (static) methods: QSingleShotTimer's interval isn't limited by the `int` interval in QTimer, so this is OK, no narrowing. start(int)/setInterval(int): Techincally it makes no difference which overloads delegate to which, because QTimer stores the interval in an `int` (QProperty); so any {int interval,chrono::milliseconds.count()} > INT_MAX is narrowing anyway. But it's less confusing and matches what has been done in other classes when porting them to chrono, int overload delegates to chrono overload. Change-Id: I5ae0888f16130ae28a74be4498a180485fa34550 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>