[gnome-themes-standard] csd: don't draw a border for automatic CSD titles added by GTK

[Jakub Steiner <jimmac src gnome org>]

commit 99f550fadb0b800cdd5ace7bf7ca38ba0bc58faa
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Aug 22 16:25:37 2013 +0100

    csd: don't draw a border for automatic CSD titles added by GTK
    
    For those we want to be consistent with the mutter theme we have
    nowadays, so use the extra style class to distinguish that case, and
    remove any border there.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706418

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index f833c50..7f71414 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -4062,6 +4062,15 @@ GtkBubbleWindow .toolbar {
     border-radius: 7px 7px 0px 0px;
 }
 
+/* this is the default titlebar that is added by GTK
+ * when client-side decorations are in use and the application
+ * did not set a custom titlebar.
+ */
+.titlebar.default-decoration {
+    border: none;
+    box-shadow: none;
+}
+
 .titlebar .title {
     font: Bold 11;
 }