Port all classes with inheritance to class framework

All classes that have at least one other derived class (and thus
benefit from the framework) have been now ported. These includes
NMDevice, SearchProvider, AltTab.SwitcherList, and some other
stuff around.

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

js/gdm/batch.js

@@ -21,11 +21,9 @@
 const Lang = imports.lang;
 const Signals = imports.signals;
 
-function Task() {
-    this._init.apply(this, arguments);
-}
+const Task = new Lang.Class({
+    Name: 'Task',
 
-Task.prototype = {
     _init: function(scope, handler) {
         if (scope)
             this.scope = scope;
@@ -41,22 +39,17 @@ Task.prototype = {
 
         return null;
     },
-};
+});
 Signals.addSignalMethods(Task.prototype);
 
-function Hold() {
-    this._init.apply(this, arguments);
-}
-
-Hold.prototype = {
-    __proto__: Task.prototype,
+const Hold = new Lang.Class({
+    Name: 'Hold',
+    Extends: Task,
 
     _init: function() {
-        Task.prototype._init.call(this,
-                                  this,
-                                  function () {
-                                      return this;
-                                  });
+        this.parent(this, function () {
+            return this;
+        });
 
         this._acquisitions = 1;
     },
@@ -88,18 +81,15 @@ Hold.prototype = {
     isAcquired: function() {
         return this._acquisitions > 0;
     }
-}
+});
 Signals.addSignalMethods(Hold.prototype);
 
-function Batch() {
-    this._init.apply(this, arguments);
-}
-
-Batch.prototype = {
-    __proto__: Task.prototype,
+const Batch = new Lang.Class({
+    Name: 'Batch',
+    Extends: Task,
 
     _init: function(scope, tasks) {
-        Task.prototype._init.call(this);
+        this.parent();
 
         this.tasks = [];
 
@@ -166,20 +156,12 @@ Batch.prototype = {
     cancel: function() {
         this.tasks = this.tasks.splice(0, this._currentTaskIndex + 1);
     }
-
-};
+});
 Signals.addSignalMethods(Batch.prototype);
 
-function ConcurrentBatch() {
-    this._init.apply(this, arguments);
-}
-
-ConcurrentBatch.prototype = {
-    __proto__: Batch.prototype,
-
-    _init: function(scope, tasks) {
-        Batch.prototype._init.call(this, scope, tasks);
-    },
+const ConcurrentBatch = new Lang.Class({
+    Name: 'ConcurrentBatch',
+    Extends: Batch,
 
     process: function() {
        let hold = this.runTask();
@@ -193,19 +175,12 @@ ConcurrentBatch.prototype = {
        // concurrently.
        this.nextTask();
     }
-};
+});
 Signals.addSignalMethods(ConcurrentBatch.prototype);
 
-function ConsecutiveBatch() {
-    this._init.apply(this, arguments);
-}
-
-ConsecutiveBatch.prototype = {
-    __proto__: Batch.prototype,
-
-    _init: function(scope, tasks) {
-        Batch.prototype._init.call(this, scope, tasks);
-    },
+const ConsecutiveBatch = new Lang.Class({
+    Name: 'ConsecutiveBatch',
+    Extends: Batch,
 
     process: function() {
        let hold = this.runTask();
@@ -224,5 +199,5 @@ ConsecutiveBatch.prototype = {
            this.nextTask();
        }
     }
-};
+});
 Signals.addSignalMethods(ConsecutiveBatch.prototype);