[gtk/parent-surface: 2/4] tests: Stop using gtk_widget_get_parent_surface

[Matthias Clasen <matthiasc src gnome org>]

commit fe3b5ba545d513dffca68ab683628e62895589e3
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Apr 24 20:56:43 2019 -0400

    tests: Stop using gtk_widget_get_parent_surface
    
    We can just use the surface of the parent.

 tests/testfullscreen.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/testfullscreen.c b/tests/testfullscreen.c
index acdbd15bb0..0ed79b91c2 100644
--- a/tests/testfullscreen.c
+++ b/tests/testfullscreen.c
@@ -25,7 +25,7 @@ set_fullscreen_monitor_cb (GtkWidget *widget, gpointer user_data)
   GdkFullscreenMode mode = (GdkFullscreenMode) GPOINTER_TO_INT (user_data);
   GdkSurface  *window;
 
-  window = gtk_widget_get_parent_surface (widget);
+  window = gtk_widget_get_surface (gtk_widget_get_parent (widget));
   gdk_surface_set_fullscreen_mode (window, mode);
   gdk_surface_fullscreen (window);
 }
@@ -35,7 +35,7 @@ remove_fullscreen_cb (GtkWidget *widget, gpointer user_data)
 {
   GdkSurface  *window;
 
-  window = gtk_widget_get_parent_surface (widget);
+  window = gtk_widget_get_surface (gtk_widget_get_parent (widget));
   gdk_surface_unfullscreen (window);
 }