[epiphany/wip/exalm/fullscreen: 4/5] header-bar: Add titlebar style class

[Alexander Mikhaylenko <alexm src gnome org>]

commit 64843e82df6fba6a1d2dd18c3e0c364ae0a200d6
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Sep 27 20:41:56 2019 +0500

    header-bar: Add titlebar style class
    
    Apparently, elementary stylesheet has background for .titlebar, but not for
    headerbar. This makes it legible in fullscreen.
    
    Fixes https://gitlab.gnome.org/GNOME/epiphany/issues/937

 src/ephy-header-bar.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/ephy-header-bar.c b/src/ephy-header-bar.c
index c01d61be6..44d31aa1e 100644
--- a/src/ephy-header-bar.c
+++ b/src/ephy-header-bar.c
@@ -180,6 +180,9 @@ ephy_header_bar_constructed (GObject *object)
                            G_CALLBACK (fullscreen_changed_cb), header_bar,
                            G_CONNECT_SWAPPED);
 
+  gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (header_bar)),
+                               "titlebar");
+
   /* Start action elements */
   header_bar->action_bar_start = ephy_action_bar_start_new ();
   gtk_widget_show (GTK_WIDGET (header_bar->action_bar_start));