Mine

  GtkWidget* dialog = gtk_print_unix_dialog_new(NULL, NULL);
  GtkPrintSettings* settings =
      gtk_print_unix_dialog_get_settings(GTK_PRINT_UNIX_DIALOG(dialog));
  GtkPageSetup* page_setup =
      gtk_print_unix_dialog_get_page_setup(GTK_PRINT_UNIX_DIALOG(dialog));

  PageRanges ranges_vector;  // Nothing to initialize for default settings.
  PrintSettingsInitializerGtk::InitPrintSettings(
          settings, page_setup, ranges_vector, false, &settings_);

  g_object_unref(settings);
  // |page_setup| is owned by dialog, so it does not need to be unref'ed.
  gtk_widget_destroy(dialog);