/* From xfns.c. */
-struct frame *check_x_frame (Lisp_Object);
extern void x_free_gcs (struct frame *);
/* From xrdb.c. */
extern struct x_display_info * check_x_display_info (Lisp_Object);
extern Lisp_Object x_get_focus_frame (struct frame *);
-extern int x_in_use;
#ifdef USE_GTK
extern int xg_set_icon (struct frame *, Lisp_Object);