GTK: More GSEALing.

ui/base/gtk/gtk_compat.h

Index: ui/base/gtk/gtk_compat.h
diff --git a/ui/base/gtk/gtk_compat.h b/ui/base/gtk/gtk_compat.h
index 4ca12df7fc309755a8ed730583be3a56f3d7a846..3c3b29f4332413d65bd39975e66d55174c9a04bf 100644
--- a/ui/base/gtk/gtk_compat.h
+++ b/ui/base/gtk/gtk_compat.h
@@ -70,6 +70,10 @@ 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);