Exposed MetaWindowType so it can be used by compositor backends.

meta_window_get_type:
meta_window_get_type_atom:
Accessors for window type/type atom.

src/core/window-private.h

@@ -42,19 +42,6 @@ typedef struct _MetaWindowQueue MetaWindowQueue;
 typedef gboolean (*MetaWindowForeachFunc) (MetaWindow *window,
                                            void       *data);
 
-typedef enum
-{
-  META_WINDOW_NORMAL,
-  META_WINDOW_DESKTOP,
-  META_WINDOW_DOCK,
-  META_WINDOW_DIALOG,
-  META_WINDOW_MODAL_DIALOG,
-  META_WINDOW_TOOLBAR,
-  META_WINDOW_MENU,
-  META_WINDOW_UTILITY,
-  META_WINDOW_SPLASHSCREEN
-} MetaWindowType;
-
 typedef enum
 {
   META_MAXIMIZE_HORIZONTAL = 1 << 0,