This patch is amended version of 67cc8fea10,
which was temporary reverted to simplify integration of conflicting
patches. What was amended:
- Dropped the factory interface. It is sufficiently clean to check for
QXcbConnection::isConnected().
Task-number: QTBUG-68859
Change-Id: I810897b3ea20e356fc4d62e6f01231fd287962dc
Reviewed-by: Johan Helsing <johan.helsing@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>