[MetaDisplay] meta_display_get_leader_window()

This function returns xid of the WM leader window (as defined by the
_NET_SUPPORTING_WM_CHECK mechanism of EWMH). For use by plugins that wish to
attach custom properties to this window.

https://bugzilla.gnome.org/show_bug.cgi?id=613125

src/include/display.h

@@ -154,4 +154,6 @@ void meta_display_focus_the_no_focus_window (MetaDisplay *display,
 GSList *meta_display_sort_windows_by_stacking (MetaDisplay *display,
                                                GSList      *windows);
 
+Window meta_display_get_leader_window (MetaDisplay *display);
+
 #endif