[gtk/kill-containers: 4/8] Use gtk_info_bar_add_child throughout

[Matthias Clasen <matthiasc src gnome org>]

commit 4ca110744e35e3a53e1b87865b9e7e6b9a4872ce
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu May 7 12:52:49 2020 -0400

    Use gtk_info_bar_add_child throughout

 tests/testinfobar.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/testinfobar.c b/tests/testinfobar.c
index 9145aba9c2..ee7ab749fb 100644
--- a/tests/testinfobar.c
+++ b/tests/testinfobar.c
@@ -35,8 +35,8 @@ on_activate (GApplication *application,
   box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
 
   info_bar = gtk_info_bar_new ();
-  gtk_container_add (GTK_CONTAINER (info_bar),
-                     gtk_label_new ("Hello!\nI am a GtkInfoBar"));
+  gtk_info_bar_add_child (GTK_INFO_BAR (info_bar),
+                          gtk_label_new ("Hello!\nI am a GtkInfoBar"));
 
   widget = gtk_toggle_button_new_with_label ("Toggle :visible");
   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (widget), TRUE);