[gtk/kill-hierarchy-changed: 8/14] header bar: Stop using ::hierarchy-changed

[Matthias Clasen <matthiasc src gnome org>]

commit 0230a7b1e53add380f2e0d154707e688a8bb6395
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Feb 23 01:02:55 2019 -0500

    header bar: Stop using ::hierarchy-changed
    
    Use the root and unroot vfuncs instead.

 gtk/gtkheaderbar.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index ab913812e4..828250f653 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -1755,11 +1755,12 @@ surface_state_changed (GtkWidget *widget)
 }
 
 static void
-gtk_header_bar_hierarchy_changed (GtkWidget *widget,
-                                  GtkWidget *previous_toplevel)
+gtk_header_bar_root (GtkWidget *widget)
 {
   GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
 
+  GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->root (widget);
+
   _gtk_header_bar_update_window_buttons (bar);
 }
 
@@ -1779,7 +1780,7 @@ gtk_header_bar_class_init (GtkHeaderBarClass *class)
   widget_class->measure = gtk_header_bar_measure;
   widget_class->realize = gtk_header_bar_realize;
   widget_class->unrealize = gtk_header_bar_unrealize;
-  widget_class->hierarchy_changed = gtk_header_bar_hierarchy_changed;
+  widget_class->root = gtk_header_bar_root;
 
   container_class->add = gtk_header_bar_add;
   container_class->remove = gtk_header_bar_remove;