[gnome-shell] messageTray: Add 'source-removed' signal

[Florian MÃllner <fmuellner src gnome org>]

commit 7f587fd4dab3bfecde3b6dd901c85b5d2c9df966
Author: Florian MÃllner <fmuellner gnome org>
Date:   Tue Feb 5 19:06:19 2013 +0100

    messageTray: Add 'source-removed' signal
    
    While it is possible to keep track of removed sources by tracking
    their summary items' actor:.destroy signal, a dedicated signal
    mirroring the existing 'source-added' one is more convenient.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693220

 js/ui/messageTray.js |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 49faf7a..1722861 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1817,6 +1817,8 @@ const MessageTray = new Lang.Class({
 
         summaryItem.destroy();
 
+        this.emit('source-removed', source);
+
         this._updateNoMessagesLabel();
 
         if (needUpdate)