[gtk/wip/chergert/quartz4u] move on to next vfunc

[Christian Hergert <chergert src gnome org>]

commit b66e40dffa19b45f449a962455a7280a0f284cb1
Author: Christian Hergert <chergert redhat com>
Date:   Mon Apr 27 16:55:23 2020 -0700

    move on to next vfunc

 gdk/macos/gdkmacossurface.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 7c799464eb..d7bdaf8d9a 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -43,6 +43,15 @@ typedef struct
 
 G_DEFINE_TYPE_WITH_PRIVATE (GdkMacosSurface, gdk_macos_surface, GDK_TYPE_SURFACE)
 
+static void
+gdk_macos_surface_set_input_region (GdkSurface     *surface,
+                                    cairo_region_t *region)
+{
+  g_assert (GDK_IS_MACOS_SURFACE (surface));
+
+  /* TODO: */
+}
+
 static void
 gdk_macos_surface_finalize (GObject *object)
 {
@@ -58,8 +67,11 @@ static void
 gdk_macos_surface_class_init (GdkMacosSurfaceClass *klass)
 {
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GdkSurfaceClass *surface_class = GDK_SURFACE_CLASS (klass);
 
   object_class->finalize = gdk_macos_surface_finalize;
+
+  surface_class->set_input_region = gdk_macos_surface_set_input_region;
 }
 
 static void