[gnome-shell] overview: don't clone the whole message tray when layouting

[Cosimo Cecchi <cosimoc src gnome org>]

commit e89ce7358aad7acfd7cf60e350a188111a355bc2
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Dec 13 17:49:06 2012 -0500

    overview: don't clone the whole message tray when layouting
    
    The message tray actor also includes notifications themselves. We want
    our ghost to be sized as the base part of the tray instead.
    Just make sure to use the same style class as the base actor then, as
    its height is specified by the CSS.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=690174

 js/ui/overview.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/overview.js b/js/ui/overview.js
index 40f4acf..5ece49d 100644
--- a/js/ui/overview.js
+++ b/js/ui/overview.js
@@ -243,7 +243,7 @@ const Overview = new Lang.Class({
                                           expand: true });
 
         // Then account for message tray
-        this._messageTrayGhost = new St.Bin({ child: new Clutter.Clone({ source: Main.messageTray.actor }),
+        this._messageTrayGhost = new St.Bin({ style_class: 'message-tray-summary',
                                               reactive: false,
                                               opacity: 0,
                                               x_fill: true,