GTK: More GSEALing.

ui/base/gtk/gtk_compat.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_GTK_GTK_COMPAT_H_
 #define UI_BASE_GTK_GTK_COMPAT_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 52 matching lines @@
 inline GdkWindow* gtk_button_get_event_window(GtkButton* button) {
   return button->event_window;
 }
 #endif  // !GTK_CHECK_VERSION(2, 22, 0)
 
 #if !GTK_CHECK_VERSION(2, 24, 0)
 inline void gdk_pixmap_get_size(GdkPixmap* pixmap, gint* width, gint* height) {
   gdk_drawable_get_size(GDK_DRAWABLE(pixmap), width, height);
 }
 
+inline GdkDisplay* gdk_window_get_display(GdkWindow* window) {
+  return gdk_drawable_get_display(GDK_DRAWABLE(window));
+}
+
 inline int gdk_window_get_height(GdkWindow* window) {
   int height;
   gdk_drawable_get_size(GDK_DRAWABLE(window), NULL, &height);
   return height;
 }
 
 inline GdkScreen* gdk_window_get_screen(GdkWindow* window) {
   return gdk_drawable_get_screen(GDK_DRAWABLE(window));
 }
 
 inline int gdk_window_get_width(GdkWindow* window) {
   int width;
   gdk_drawable_get_size(GDK_DRAWABLE(window), &width, NULL);
   return width;
 }
 #endif  // !GTK_CHECK_VERSION(2, 24, 0)
 
 #endif  // UI_BASE_GTK_GTK_COMPAT_H_