The basic idea is that a project like vkd3d could provide its own
implementation of the IWineDXGISwapChainFactory interface, and so wouldn't
need specific handling in dxgi_factory_CreateSwapChainForHwnd().
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>