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/windowManager.js

@@ -31,11 +31,9 @@ function getTopInvisibleBorder(metaWindow) {
     return outerRect.y - inputRect.y;
 }
 
-function WindowDimmer(actor) {
-    this._init(actor);
-}
+const WindowDimmer = new Lang.Class({
+    Name: 'WindowDimmer',
 
-WindowDimmer.prototype = {
     _init: function(actor) {
         if (Clutter.feature_available(Clutter.FeatureFlags.SHADERS_GLSL)) {
             this._effect = new Clutter.ShaderEffect({ shader_type: Clutter.ShaderType.FRAGMENT_SHADER });
@@ -75,7 +73,7 @@ WindowDimmer.prototype = {
     },
 
     _dimFraction: 0.0
-};
+});
 
 function getWindowDimmer(actor) {
     if (!actor._windowDimmer)
@@ -84,11 +82,9 @@ function getWindowDimmer(actor) {
     return actor._windowDimmer;
 }
 
-function WindowManager() {
-    this._init();
-}
+const WindowManager = new Lang.Class({
+    Name: 'WindowManager',
 
-WindowManager.prototype = {
     _init : function() {
         this._shellwm =  global.window_manager;
 
@@ -627,4 +623,4 @@ WindowManager.prototype = {
         if (!Main.overview.visible)
             this._workspaceSwitcherPopup.display(WorkspaceSwitcherPopup.DOWN, indexToActivate);
     }
-};
+});