Port GDM and Caribou to GDBus

During the mass port to GDBus, this classes were left out (probably
because they didn't exist at the time). Now it's time to update
them.

https://bugzilla.gnome.org/show_bug.cgi?id=664436

js/gdm/consoleKit.js

@@ -1,32 +1,22 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 
-const DBus = imports.dbus;
+const Gio = imports.gi.Gio;
 
-const ConsoleKitManagerIface = {
-    name: 'org.freedesktop.ConsoleKit.Manager',
-    methods: [{ name: 'CanRestart',
-                inSignature: '',
-                outSignature: 'b' },
-              { name: 'CanStop',
-                inSignature: '',
-                outSignature: 'b' },
-              { name: 'Restart',
-                inSignature: '',
-                outSignature: '' },
-              { name: 'Stop',
-                inSignature: '',
-                outSignature: '' }]
-};
+const ConsoleKitManagerIface = <interface name='org.freedesktop.ConsoleKit.Manager'>
+<method name='CanRestart'>
+    <arg type='b' direction='out'/>
+</method>
+<method name='CanStop'>
+    <arg type='b' direction='out'/>
+</method>
+<method name='Restart' />
+<method name='Stop' />
+</interface>;
+
+const ConsoleKitProxy = Gio.DBusProxy.makeProxyWrapper(ConsoleKitManagerIface);
 
 function ConsoleKitManager() {
-    this._init();
+    return new ConsoleKitProxy(Gio.DBus.system,
+                               'org.freedesktop.ConsoleKit',
+                               '/org/freedesktop/ConsoleKit/Manager');
 };
-
-ConsoleKitManager.prototype = {
-    _init: function() {
-        DBus.system.proxifyObject(this,
-                                  'org.freedesktop.ConsoleKit',
-                                  '/org/freedesktop/ConsoleKit/Manager');
-    }
-};
-DBus.proxifyPrototype(ConsoleKitManager.prototype, ConsoleKitManagerIface);