Port everything to class framework

The last patch in the sequence. Every place that was previously
setting prototype has been ported to Lang.Class, to make code more
concise and allow for better toString().

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

js/ui/altTab.js

@@ -43,11 +43,9 @@ function primaryModifier(mask) {
     return primary;
 }
 
-function AltTabPopup() {
-    this._init();
-}
+const AltTabPopup = new Lang.Class({
+    Name: 'AltTabPopup',
 
-AltTabPopup.prototype = {
     _init : function() {
         this.actor = new Shell.GenericContainer({ name: 'altTabPopup',
                                                   reactive: true,
@@ -540,7 +538,7 @@ AltTabPopup.prototype = {
                            onComplete: Lang.bind(this, function () { this.thumbnailsVisible = true; })
                          });
     }
-};
+});
 
 const SwitcherList = new Lang.Class({
     Name: 'SwitcherList',
@@ -853,11 +851,9 @@ const SwitcherList = new Lang.Class({
 
 Signals.addSignalMethods(SwitcherList.prototype);
 
-function AppIcon(app) {
-    this._init(app);
-}
+const AppIcon = new Lang.Class({
+    Name: 'AppIcon',
 
-AppIcon.prototype = {
     _init: function(app) {
         this.app = app;
         this.actor = new St.BoxLayout({ style_class: 'alt-tab-app',
@@ -875,7 +871,7 @@ AppIcon.prototype = {
         this._iconBin.set_size(size, size);
         this._iconBin.child = this.icon;
     }
-};
+});
 
 const AppSwitcher = new Lang.Class({
     Name: 'AppSwitcher',