[gtkmm] Gdk::Window: Add get/set_passthrough().

[Murray Cumming <murrayc src gnome org>]

commit a21d89860636ebeca83301d07131655e9b9ebdf5
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jun 30 11:52:58 2015 +0200

    Gdk::Window: Add get/set_passthrough().

 gdk/src/window.hg |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gdk/src/window.hg b/gdk/src/window.hg
index 6af6b66..ebb6f49 100644
--- a/gdk/src/window.hg
+++ b/gdk/src/window.hg
@@ -127,6 +127,9 @@ public:
   _WRAP_METHOD(void set_child_input_shapes(), gdk_window_set_child_input_shapes)
   _WRAP_METHOD(void merge_child_input_shapes(), gdk_window_merge_child_input_shapes)
 
+  _WRAP_METHOD(void set_pass_through(bool pass_through = true), gdk_window_set_pass_through)
+  _WRAP_METHOD(bool get_pass_through() const, gdk_window_get_pass_through)
+
   _WRAP_METHOD(bool is_visible() const, gdk_window_is_visible)
   _WRAP_METHOD(bool is_viewable() const, gdk_window_is_viewable)
   _WRAP_METHOD(bool is_input_only() const, gdk_window_is_input_only)