[gnome-shell] legacyTray: Allow extensions to hijack the tray-icon-added/removed signals

[Adel Gadllah <agadllah src gnome org>]

commit 5f6aba7f4b80f16a2a9f75797e450df53a7492df
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Fri Mar 6 13:47:47 2015 +0100

    legacyTray: Allow extensions to hijack the tray-icon-added/removed signals

 js/ui/legacyTray.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/legacyTray.js b/js/ui/legacyTray.js
index a167ea2..f3d8613 100644
--- a/js/ui/legacyTray.js
+++ b/js/ui/legacyTray.js
@@ -85,8 +85,8 @@ const LegacyTray = new Lang.Class({
         Main.layoutManager.trackChrome(this._slider, { affectsInputRegion: true });
 
         this._trayManager = new Shell.TrayManager();
-        this._trayManager.connect('tray-icon-added', Lang.bind(this, this._onTrayIconAdded));
-        this._trayManager.connect('tray-icon-removed', Lang.bind(this, this._onTrayIconRemoved));
+        this._trayIconAddedId = this._trayManager.connect('tray-icon-added', Lang.bind(this, 
this._onTrayIconAdded));
+        this._trayIconRemovedId = this._trayManager.connect('tray-icon-removed', Lang.bind(this, 
this._onTrayIconRemoved));
         this._trayManager.manage_screen(global.screen, this.actor);
 
         Main.overview.connect('showing', Lang.bind(this,