MetaKms* will be a dedicated namespace, which MetaKmsBuffer doesn't fit under. https://gitlab.gnome.org/GNOME/mutter/merge_requests/584
https://gitlab.gnome.org/GNOME/mutter/merge_requests/584
Start reference counting front buffers instead of assuming we know their (scanout) lifetimes. Functionally, this should not change anything. https://gitlab.gnome.org/GNOME/mutter/merge_requests/119