Cannot construct WindowEvent::ScaleFactorChanged for tests #4326
Description
The WindowEvent::ScaleFactorChanged event has an inner_size_writer member that must be set, but there is no way to construct InnerSizeWriter from outside of winit because its new function is pub(crate).
For the purposes of my test, I don't really want to construct InnerSizeWriter since I have no use for it, so it'd be awesome if it could be defaulted.