diff --git a/js/gdm/batch.js b/js/gdm/batch.js
index bc9642e59..13db8c9ce 100644
--- a/js/gdm/batch.js
+++ b/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);
diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index 5aaa8d492..166ca365b 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -542,11 +542,9 @@ AltTabPopup.prototype = {
     }
 };
 
-function SwitcherList(squareItems) {
-    this._init(squareItems);
-}
+const SwitcherList = new Lang.Class({
+    Name: 'SwitcherList',
 
-SwitcherList.prototype = {
     _init : function(squareItems) {
         this.actor = new Shell.GenericContainer({ style_class: 'switcher-list' });
         this.actor.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
@@ -851,7 +849,7 @@ SwitcherList.prototype = {
         // Clip the area for scrolling
         this._clipBin.set_clip(0, -topPadding, (this.actor.allocation.x2 - this.actor.allocation.x1) - leftPadding - rightPadding, this.actor.height + bottomPadding);
     }
-};
+});
 
 Signals.addSignalMethods(SwitcherList.prototype);
 
@@ -879,15 +877,12 @@ AppIcon.prototype = {
     }
 };
 
-function AppSwitcher() {
-    this._init.apply(this, arguments);
-}
-
-AppSwitcher.prototype = {
-    __proto__ : SwitcherList.prototype,
+const AppSwitcher = new Lang.Class({
+    Name: 'AppSwitcher',
+    Extends: SwitcherList,
 
     _init : function(localApps, otherApps, altTabPopup) {
-        SwitcherList.prototype._init.call(this, true);
+        this.parent(true);
 
         // Construct the AppIcons, add to the popup
         let activeWorkspace = global.screen.get_active_workspace();
@@ -966,7 +961,7 @@ AppSwitcher.prototype = {
 
     _allocate: function (actor, box, flags) {
         // Allocate the main list items
-        SwitcherList.prototype._allocate.call(this, actor, box, flags);
+        this.parent(actor, box, flags);
 
         let arrowHeight = Math.floor(this.actor.get_theme_node().get_padding(St.Side.BOTTOM) / 3);
         let arrowWidth = arrowHeight * 2;
@@ -1021,7 +1016,7 @@ AppSwitcher.prototype = {
                 this._arrows[this._curApp].remove_style_pseudo_class('highlighted');
         }
 
-        SwitcherList.prototype.highlight.call(this, n, justOutline);
+        this.parent(n, justOutline);
         this._curApp = n;
 
         if (this._curApp != -1) {
@@ -1045,17 +1040,14 @@ AppSwitcher.prototype = {
         if (appIcon.cachedWindows.length == 1)
             arrow.hide();
     }
-};
+});
 
-function ThumbnailList(windows) {
-    this._init(windows);
-}
-
-ThumbnailList.prototype = {
-    __proto__ : SwitcherList.prototype,
+const ThumbnailList = new Lang.Class({
+    Name: 'ThumbnailList',
+    Extends: SwitcherList,
 
     _init : function(windows) {
-        SwitcherList.prototype._init.call(this);
+        this.parent(false);
 
         let activeWorkspace = global.screen.get_active_workspace();
 
@@ -1133,7 +1125,7 @@ ThumbnailList.prototype = {
         // Make sure we only do this once
         this._thumbnailBins = new Array();
     }
-};
+});
 
 function _drawArrow(area, side) {
     let themeNode = area.get_theme_node();
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 98f16e8b7..4db20c411 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -308,15 +308,13 @@ AllAppDisplay.prototype = {
     }
 };
 
-function AppSearchProvider() {
-    this._init();
-}
-
-AppSearchProvider.prototype = {
-    __proto__: Search.SearchProvider.prototype,
+const AppSearchProvider = new Lang.Class({
+    Name: 'AppSearchProvider',
+    Extends: Search.SearchProvider,
 
     _init: function() {
-        Search.SearchProvider.prototype._init.call(this, _("APPLICATIONS"));
+        this.parent(_("APPLICATIONS"));
+
         this._appSys = Shell.AppSystem.get_default();
     },
 
@@ -364,17 +362,15 @@ AppSearchProvider.prototype = {
         let icon = new AppWellIcon(app);
         return icon.actor;
     }
-};
+});
 
-function SettingsSearchProvider() {
-    this._init();
-}
-
-SettingsSearchProvider.prototype = {
-    __proto__: Search.SearchProvider.prototype,
+const SettingsSearchProvider = new Lang.Class({
+    Name: 'SettingsSearchProvider',
+    Extends: Search.SearchProvider,
 
     _init: function() {
-        Search.SearchProvider.prototype._init.call(this, _("SETTINGS"));
+        this.parent(_("SETTINGS"));
+
         this._appSys = Shell.AppSystem.get_default();
         this._gnomecc = this._appSys.lookup_app('gnome-control-center.desktop');
     },
@@ -412,29 +408,24 @@ SettingsSearchProvider.prototype = {
         let icon = new AppWellIcon(app);
         return icon.actor;
     }
-};
+});
 
-function AppIcon(app, params) {
-    this._init(app, params);
-}
-
-AppIcon.prototype = {
-    __proto__:  IconGrid.BaseIcon.prototype,
+const AppIcon = new Lang.Class({
+    Name: 'AppIcon',
+    Extends: IconGrid.BaseIcon,
 
     _init : function(app, params) {
         this.app = app;
 
         let label = this.app.get_name();
 
-        IconGrid.BaseIcon.prototype._init.call(this,
-                                               label,
-                                               params);
+        this.parent(label, params);
     },
 
     createIcon: function(iconSize) {
         return this.app.create_icon_texture(iconSize);
     }
-};
+});
 
 function AppWellIcon(app, iconParams, onActivateOverride) {
     this._init(app, iconParams, onActivateOverride);
diff --git a/js/ui/contactDisplay.js b/js/ui/contactDisplay.js
index adeeb0c21..fe34a5475 100644
--- a/js/ui/contactDisplay.js
+++ b/js/ui/contactDisplay.js
@@ -135,15 +135,12 @@ Contact.prototype = {
 
 
 /* Searches for and returns contacts */
-function ContactSearchProvider() {
-    this._init();
-}
-
-ContactSearchProvider.prototype = {
-    __proto__: Search.SearchProvider.prototype,
+const ContactSearchProvider = new Lang.Class({
+    Name: 'ContactSearchProvider',
+    Extends: Search.SearchProvider,
 
     _init: function() {
-        Search.SearchProvider.prototype._init.call(this, _("CONTACTS"));
+        this.parent(_("CONTACTS"));
         this._contactSys = Shell.ContactSystem.get_default();
     },
 
@@ -182,4 +179,4 @@ ContactSearchProvider.prototype = {
     activateResult: function(id, params) {
         launchContact(id);
     }
-};
+});
diff --git a/js/ui/ctrlAltTab.js b/js/ui/ctrlAltTab.js
index 86ff4ec99..9340846fd 100644
--- a/js/ui/ctrlAltTab.js
+++ b/js/ui/ctrlAltTab.js
@@ -305,15 +305,12 @@ CtrlAltTabPopup.prototype = {
     }
 };
 
-function CtrlAltTabSwitcher(items) {
-    this._init(items);
-}
-
-CtrlAltTabSwitcher.prototype = {
-    __proto__ : AltTab.SwitcherList.prototype,
+const CtrlAltTabSwitcher = new Lang.Class({
+    Name: 'CtrlAltTabSwitcher',
+    Extends: AltTab.SwitcherList,
 
     _init : function(items) {
-        AltTab.SwitcherList.prototype._init.call(this, true);
+        this.parent(true);
 
         for (let i = 0; i < items.length; i++)
             this._addIcon(items[i]);
@@ -336,4 +333,4 @@ CtrlAltTabSwitcher.prototype = {
 
         this.addItem(box, text);
     }
-};
+});
diff --git a/js/ui/dash.js b/js/ui/dash.js
index 448a5ede9..0ddec795b 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -19,11 +19,9 @@ const DASH_ANIMATION_TIME = 0.2;
 
 // A container like StBin, but taking the child's scale into account
 // when requesting a size
-function DashItemContainer() {
-    this._init();
-}
+const DashItemContainer = new Lang.Class({
+    Name: 'DashItemContainer',
 
-DashItemContainer.prototype = {
     _init: function() {
         this.actor = new Shell.GenericContainer({ style_class: 'dash-item-container' });
         this.actor.connect('get-preferred-width',
@@ -157,17 +155,14 @@ DashItemContainer.prototype = {
     get childOpacity() {
         return this._childOpacity;
     }
-};
+});
 
-function RemoveFavoriteIcon() {
-    this._init();
-}
-
-RemoveFavoriteIcon.prototype = {
-    __proto__: DashItemContainer.prototype,
+const RemoveFavoriteIcon = new Lang.Class({
+    Name: 'RemoveFavoriteIcon',
+    Extends: DashItemContainer,
 
     _init: function() {
-        DashItemContainer.prototype._init.call(this);
+        this.parent();
 
         this._iconBin = new St.Bin({ style_class: 'remove-favorite' });
         this._iconActor = null;
@@ -219,22 +214,17 @@ RemoveFavoriteIcon.prototype = {
 
         return true;
     }
-};
+});
 
-
-function DragPlaceholderItem() {
-    this._init();
-}
-
-DragPlaceholderItem.prototype = {
-    __proto__: DashItemContainer.prototype,
+const DragPlaceholderItem = new Lang.Class({
+    Name: 'DragPlaceholderItem',
+    Extends: DashItemContainer,
 
     _init: function() {
-        DashItemContainer.prototype._init.call(this);
+        this.parent();
         this.setChild(new St.Bin({ style_class: 'placeholder' }));
     }
-};
-
+});
 
 function Dash() {
     this._init();
diff --git a/js/ui/docDisplay.js b/js/ui/docDisplay.js
index 9c8fe33ee..b331d0365 100644
--- a/js/ui/docDisplay.js
+++ b/js/ui/docDisplay.js
@@ -1,19 +1,16 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 
 const DocInfo = imports.misc.docInfo;
+const Lang = imports.lang;
 const Params = imports.misc.params;
 const Search = imports.ui.search;
 
-
-function DocSearchProvider() {
-    this._init();
-}
-
-DocSearchProvider.prototype = {
-    __proto__: Search.SearchProvider.prototype,
+const DocSearchProvider = new Lang.Class({
+    Name: 'DocSearchProvider',
+    Extends: Search.SearchProvider,
 
     _init: function(name) {
-        Search.SearchProvider.prototype._init.call(this, _("RECENT ITEMS"));
+        this.parent(_("RECENT ITEMS"));
         this._docManager = DocInfo.getDocManager();
     },
 
@@ -44,4 +41,4 @@ DocSearchProvider.prototype = {
     getSubsearchResultSet: function(previousResults, terms) {
         return this._docManager.subsearch(previousResults, terms);
     }
-};
+});
diff --git a/js/ui/iconGrid.js b/js/ui/iconGrid.js
index 765bd2b1e..f266577c6 100644
--- a/js/ui/iconGrid.js
+++ b/js/ui/iconGrid.js
@@ -10,11 +10,9 @@ const Params = imports.misc.params;
 const ICON_SIZE = 48;
 
 
-function BaseIcon(label, createIcon) {
-    this._init(label, createIcon);
-}
+const BaseIcon = new Lang.Class({
+    Name: 'BaseIcon',
 
-BaseIcon.prototype = {
     _init : function(label, params) {
         params = Params.parse(params, { createIcon: null,
                                         setSizeManually: false,
@@ -149,7 +147,7 @@ BaseIcon.prototype = {
 
         this._createIconTexture(size);
     }
-};
+});
 
 function IconGrid(params) {
     this._init(params);
diff --git a/js/ui/link.js b/js/ui/link.js
index 4ad9baa89..765f6951e 100644
--- a/js/ui/link.js
+++ b/js/ui/link.js
@@ -4,11 +4,9 @@ const Lang = imports.lang;
 const Signals = imports.signals;
 const St = imports.gi.St;
 
-function Link(props) {
-    this._init(props);
-}
+const Link = new Lang.Class({
+    Name: 'Link',
 
-Link.prototype = {
     _init : function(props) {
         let realProps = { reactive: true,
                           track_hover: true,
@@ -19,6 +17,5 @@ Link.prototype = {
 
         this.actor = new St.Button(realProps);
     }
-};
-
+});
 Signals.addSignalMethods(Link.prototype);
diff --git a/js/ui/lookingGlass.js b/js/ui/lookingGlass.js
index 2d9c0541b..109174d5c 100644
--- a/js/ui/lookingGlass.js
+++ b/js/ui/lookingGlass.js
@@ -262,12 +262,9 @@ function objectToString(o) {
     }
 }
 
-function ObjLink(o, title) {
-    this._init(o, title);
-}
-
-ObjLink.prototype = {
-    __proto__: Link.Link,
+const ObjLink = new Lang.Class({
+    Name: 'ObjLink',
+    Extends: Link.Link,
 
     _init: function(o, title) {
         let text;
@@ -277,7 +274,8 @@ ObjLink.prototype = {
             text = objectToString(o);
         text = GLib.markup_escape_text(text, -1);
         this._obj = o;
-        Link.Link.prototype._init.call(this, { label: text });
+
+        this.parent({ label: text });
         this.actor.get_child().single_line_mode = true;
         this.actor.connect('clicked', Lang.bind(this, this._onClicked));
     },
@@ -285,7 +283,7 @@ ObjLink.prototype = {
     _onClicked: function (link) {
         Main.lookingGlass.inspectObject(this._obj, this.actor);
     }
-};
+});
 
 function Result(command, o, index) {
     this._init(command, o, index);
diff --git a/js/ui/placeDisplay.js b/js/ui/placeDisplay.js
index 19f823fff..e8cec7164 100644
--- a/js/ui/placeDisplay.js
+++ b/js/ui/placeDisplay.js
@@ -22,11 +22,9 @@ const Util = imports.misc.util;
  * @iconFactory: A JavaScript callback which will create an icon texture given a size parameter
  * @launch: A JavaScript callback to launch the entry
  */
-function PlaceInfo(id, name, iconFactory, launch) {
-    this._init(id, name, iconFactory, launch);
-}
+const PlaceInfo = new Lang.Class({
+    Name: 'PlaceInfo',
 
-PlaceInfo.prototype = {
     _init: function(id, name, iconFactory, launch) {
         this.id = id;
         this.name = name;
@@ -55,7 +53,7 @@ PlaceInfo.prototype = {
     isRemovable: function() {
         return false;
     }
-};
+});
 
 // Helper function to translate launch parameters into a GAppLaunchContext
 function _makeLaunchContext(params)
@@ -72,12 +70,9 @@ function _makeLaunchContext(params)
     return launchContext;
 }
 
-function PlaceDeviceInfo(mount) {
-    this._init(mount);
-}
-
-PlaceDeviceInfo.prototype = {
-    __proto__: PlaceInfo.prototype,
+const PlaceDeviceInfo = new Lang.Class({
+    Name: 'PlaceDeviceInfo',
+    Extends: PlaceInfo,
 
     _init: function(mount) {
         this._mount = mount;
@@ -123,7 +118,7 @@ PlaceDeviceInfo.prototype = {
                                      _("Retry"));
         }
     }
-};
+});
 
 function PlacesManager() {
     this._init();
@@ -363,16 +358,12 @@ PlacesManager.prototype = {
 };
 Signals.addSignalMethods(PlacesManager.prototype);
 
-
-function PlaceSearchProvider() {
-    this._init();
-}
-
-PlaceSearchProvider.prototype = {
-    __proto__: Search.SearchProvider.prototype,
+const PlaceSearchProvider = new Lang.Class({
+    Name: 'PlaceSearchProvider',
+    Extends: Search.SearchProvider,
 
     _init: function() {
-        Search.SearchProvider.prototype._init.call(this, _("PLACES & DEVICES"));
+        this.parent(_("PLACES & DEVICES"));
     },
 
     getResultMeta: function(resultId) {
@@ -434,4 +425,4 @@ PlaceSearchProvider.prototype = {
         let places = previousResults.map(function (id) { return Main.placesManager.lookupPlaceById(id); });
         return this._searchPlaces(places, terms);
     }
-};
+});
diff --git a/js/ui/runDialog.js b/js/ui/runDialog.js
index 2c8e869d0..eed476684 100644
--- a/js/ui/runDialog.js
+++ b/js/ui/runDialog.js
@@ -164,14 +164,12 @@ CommandCompleter.prototype = {
     }
 };
 
-function RunDialog() {
-    this._init();
-}
+const RunDialog = new Lang.Class({
+    Name: 'RunDialog',
+    Extends: ModalDialog.ModalDialog,
 
-RunDialog.prototype = {
-__proto__: ModalDialog.ModalDialog.prototype,
     _init : function() {
-        ModalDialog.ModalDialog.prototype._init.call(this, { styleClass: 'run-dialog' });
+        this.parent({ styleClass: 'run-dialog' });
 
         this._lockdownSettings = new Gio.Settings({ schema: LOCKDOWN_SCHEMA });
         this._terminalSettings = new Gio.Settings({ schema: TERMINAL_SCHEMA });
@@ -384,8 +382,7 @@ __proto__: ModalDialog.ModalDialog.prototype,
         if (this._lockdownSettings.get_boolean(DISABLE_COMMAND_LINE_KEY))
             return;
 
-        ModalDialog.ModalDialog.prototype.open.call(this);
+        this.parent();
     },
-
-};
+});
 Signals.addSignalMethods(RunDialog.prototype);
diff --git a/js/ui/search.js b/js/ui/search.js
index 20c5f81a4..12a12e59d 100644
--- a/js/ui/search.js
+++ b/js/ui/search.js
@@ -23,11 +23,9 @@ const MatchType = {
     MULTIPLE_PREFIX: 4
 };
 
-function SearchResultDisplay(provider) {
-    this._init(provider);
-}
+const SearchResultDisplay = new Lang.Class({
+    Name: 'SearchResultDisplay',
 
-SearchResultDisplay.prototype = {
     _init: function(provider) {
         this.provider = provider;
         this.actor = null;
@@ -96,7 +94,7 @@ SearchResultDisplay.prototype = {
     activateSelected: function() {
         throw new Error('Not implemented');
     }
-};
+});
 
 /**
  * SearchProvider:
@@ -105,11 +103,9 @@ SearchResultDisplay.prototype = {
  * to the search system, then call registerProvider()
  * in SearchSystem with an instance.
  */
-function SearchProvider(title) {
-    this._init(title);
-}
+const SearchProvider = new Lang.Class({
+    Name: 'SearchProvider',
 
-SearchProvider.prototype = {
     _init: function(title) {
         this.title = title;
         this.searchSystem = null;
@@ -243,7 +239,7 @@ SearchProvider.prototype = {
     activateResult: function(id) {
         throw new Error('Not implemented');
     }
-};
+});
 Signals.addSignalMethods(SearchProvider.prototype);
 
 function OpenSearchSystem() {
diff --git a/js/ui/searchDisplay.js b/js/ui/searchDisplay.js
index 3151f0975..bd551e150 100644
--- a/js/ui/searchDisplay.js
+++ b/js/ui/searchDisplay.js
@@ -100,15 +100,13 @@ SearchResult.prototype = {
 };
 
 
-function GridSearchResults(provider, grid) {
-    this._init(provider, grid);
-}
-
-GridSearchResults.prototype = {
-    __proto__: Search.SearchResultDisplay.prototype,
+const GridSearchResults = new Lang.Class({
+    Name: 'GridSearchResults',
+    Extends: Search.SearchResultDisplay,
 
     _init: function(provider, grid) {
-        Search.SearchResultDisplay.prototype._init.call(this, provider);
+        this.parent(provider);
+
         this._grid = grid || new IconGrid.IconGrid({ rowLimit: MAX_SEARCH_RESULTS_ROWS,
                                                      xAlign: St.Align.START });
         this.actor = new St.Bin({ x_align: St.Align.START });
@@ -179,8 +177,7 @@ GridSearchResults.prototype = {
         let targetActor = this._grid.getItemAtIndex(this.selectionIndex);
         targetActor._delegate.activate();
     }
-};
-
+});
 
 function SearchResults(searchSystem, openSearchSystem) {
     this._init(searchSystem, openSearchSystem);
diff --git a/js/ui/status/network.js b/js/ui/status/network.js
index 382fa0e0d..a68bd8c5f 100644
--- a/js/ui/status/network.js
+++ b/js/ui/status/network.js
@@ -278,11 +278,10 @@ const NMWirelessSectionTitleMenuItem = new Lang.Class({
     }
 });
 
-function NMDevice() {
-    throw new TypeError('Instantanting abstract class NMDevice');
-}
+const NMDevice = new Lang.Class({
+    Name: 'NMDevice',
+    Abstract: true,
 
-NMDevice.prototype = {
     _init: function(client, device, connections) {
         this.device = device;
         if (device) {
@@ -664,26 +663,23 @@ NMDevice.prototype = {
 
         return out;
     }
-};
+});
 Signals.addSignalMethods(NMDevice.prototype);
 
 
-function NMDeviceWired() {
-    this._init.apply(this, arguments);
-}
-
-NMDeviceWired.prototype = {
-    __proto__: NMDevice.prototype,
+const NMDeviceWired = new Lang.Class({
+    Name: 'NMDeviceWired',
+    Extends: NMDevice,
 
     _init: function(client, device, connections) {
         this._autoConnectionName = _("Auto Ethernet");
         this.category = NMConnectionCategory.WIRED;
 
-        NMDevice.prototype._init.call(this, client, device, connections);
+        this.parent(client, device, connections);
     },
 
     _createSection: function() {
-        NMDevice.prototype._createSection.call(this);
+        this.parent();
 
         // if we have only one connection (normal or automatic)
         // we hide the connection list, and use the switch to control
@@ -708,14 +704,11 @@ NMDeviceWired.prototype = {
         }));
         return connection;
     }
-};
+});
 
-function NMDeviceModem() {
-    this._init.apply(this, arguments);
-}
-
-NMDeviceModem.prototype = {
-    __proto__: NMDevice.prototype,
+const NMDeviceModem = new Lang.Class({
+    Name: 'NMDeviceModem',
+    Extends: NMDevice,
 
     _init: function(client, device, connections) {
         let is_wwan = false;
@@ -764,7 +757,7 @@ NMDeviceModem.prototype = {
             }));
         }
 
-        NMDevice.prototype._init.call(this, client, device, connections);
+        this.parent(client, device, connections);
     },
 
     setEnabled: function(enabled) {
@@ -777,7 +770,7 @@ NMDeviceModem.prototype = {
                 this.statusItem.setStatus(this.getStatusLabel());
         }
 
-        NMDevice.prototype.setEnabled.call(this, enabled);
+        this.parent(enabled);
     },
 
     get connected() {
@@ -794,7 +787,7 @@ NMDeviceModem.prototype = {
             this._signalQualityId = 0;
         }
 
-        NMDevice.prototype.destroy.call(this);
+        this.parent();
     },
 
     _getSignalIcon: function() {
@@ -815,13 +808,13 @@ NMDeviceModem.prototype = {
             this.section.addMenuItem(this._operatorItem);
         }
 
-        NMDevice.prototype._createSection.call(this);
+        this.parent();
     },
 
     _clearSection: function() {
         this._operatorItem = null;
 
-        NMDevice.prototype._clearSection.call(this);
+        this.parent();
     },
 
     _createAutomaticConnection: function() {
@@ -831,14 +824,11 @@ NMDeviceModem.prototype = {
                     'connect-3g', this.device.get_path()]);
         return null;
     }
-};
+});
 
-function NMDeviceBluetooth() {
-    this._init.apply(this, arguments);
-}
-
-NMDeviceBluetooth.prototype = {
-    __proto__: NMDevice.prototype,
+const NMDeviceBluetooth = new Lang.Class({
+    Name: 'NMDeviceBluetooth',
+    Extends: NMDevice,
 
     _init: function(client, device, connections) {
         this._autoConnectionName = this._makeConnectionName(device);
@@ -846,7 +836,7 @@ NMDeviceBluetooth.prototype = {
 
         this.category = NMConnectionCategory.WWAN;
 
-        NMDevice.prototype._init.call(this, client, device, connections);
+        this.parent(client, device, connections);
     },
 
     _createAutomaticConnection: function() {
@@ -876,23 +866,20 @@ NMDeviceBluetooth.prototype = {
         this._clearSection();
         this._createSection();
     }
-};
+});
 
 
 // Not a real device, but I save a lot code this way
-function NMDeviceVPN() {
-    this._init.apply(this, arguments);
-}
-
-NMDeviceVPN.prototype = {
-    __proto__: NMDevice.prototype,
+const NMDeviceVPN = new Lang.Class({
+    Name: 'NMDeviceVPN',
+    Extends: NMDevice,
 
     _init: function(client) {
         // Disable autoconnections
         this._autoConnectionName = null;
         this.category = NMConnectionCategory.VPN;
 
-        NMDevice.prototype._init.call(this, client, null, [ ]);
+        this.parent(client, null, [ ]);
     },
 
     connectionValid: function(connection) {
@@ -908,7 +895,7 @@ NMDeviceVPN.prototype = {
     },
 
     setActiveConnection: function(activeConnection) {
-        NMDevice.prototype.setActiveConnection.call(this, activeConnection);
+        this.parent(activeConnection);
 
         this.emit('active-connection-changed');
     },
@@ -925,14 +912,11 @@ NMDeviceVPN.prototype = {
     getStatusLabel: function() {
         return null;
     }
-};
+});
 
-function NMDeviceWireless() {
-    this._init.apply(this, arguments);
-}
-
-NMDeviceWireless.prototype = {
-    __proto__: NMDevice.prototype,
+const NMDeviceWireless = new Lang.Class({
+    Name: 'NMDeviceWireless',
+    Extends: NMDevice,
 
     _init: function(client, device, connections) {
         this.category = NMConnectionCategory.WIRELESS;
@@ -1004,7 +988,7 @@ NMDeviceWireless.prototype = {
         this._apAddedId = device.connect('access-point-added', Lang.bind(this, this._accessPointAdded));
         this._apRemovedId = device.connect('access-point-removed', Lang.bind(this, this._accessPointRemoved));
 
-        NMDevice.prototype._init.call(this, client, device, validConnections);
+        this.parent(client, device, validConnections);
     },
 
     destroy: function() {
@@ -1024,7 +1008,7 @@ NMDeviceWireless.prototype = {
             this._apRemovedId = 0;
         }
 
-        NMDevice.prototype.destroy.call(this);
+        this.parent();
     },
 
     setEnabled: function(enabled) {
@@ -1338,7 +1322,7 @@ NMDeviceWireless.prototype = {
     },
 
     _clearSection: function() {
-        NMDevice.prototype._clearSection.call(this);
+        this.parent();
 
         for (let i = 0; i < this._networks.length; i++)
             this._networks[i].item = null;
@@ -1546,7 +1530,7 @@ NMDeviceWireless.prototype = {
             this._createNetworkItem(apObj, j + activeOffset);
         }
     },
-};
+});
 
 const NMApplet = new Lang.Class({
     Name: 'NMApplet',
diff --git a/js/ui/viewSelector.js b/js/ui/viewSelector.js
index 437a6f25d..dd70ca308 100644
--- a/js/ui/viewSelector.js
+++ b/js/ui/viewSelector.js
@@ -15,11 +15,9 @@ const SearchDisplay = imports.ui.searchDisplay;
 const ShellEntry = imports.ui.shellEntry;
 const Tweener = imports.ui.tweener;
 
-function BaseTab(titleActor, pageActor, name, a11yIcon) {
-    this._init(titleActor, pageActor, name, a11yIcon);
-}
+const BaseTab = new Lang.Class({
+    Name: 'BaseTab',
 
-BaseTab.prototype = {
     _init: function(titleActor, pageActor, name, a11yIcon) {
         this.title = titleActor;
         this.page = new St.Bin({ child: pageActor,
@@ -75,16 +73,13 @@ BaseTab.prototype = {
     _activate: function() {
         this.emit('activated');
     }
-};
+});
 Signals.addSignalMethods(BaseTab.prototype);
 
 
-function ViewTab(id, label, pageActor, a11yIcon) {
-    this._init(id, label, pageActor, a11yIcon);
-}
-
-ViewTab.prototype = {
-    __proto__: BaseTab.prototype,
+const ViewTab = new Lang.Class({
+    Name: 'ViewTab',
+    Extends: BaseTab,
 
     _init: function(id, label, pageActor, a11yIcon) {
         this.id = id;
@@ -93,17 +88,14 @@ ViewTab.prototype = {
                                          style_class: 'view-tab-title' });
         titleActor.connect('clicked', Lang.bind(this, this._activate));
 
-        BaseTab.prototype._init.call(this, titleActor, pageActor, label, a11yIcon);
+        this.parent(titleActor, pageActor, label, a11yIcon);
     }
-};
+});
 
 
-function SearchTab() {
-    this._init();
-}
-
-SearchTab.prototype = {
-    __proto__: BaseTab.prototype,
+const SearchTab = new Lang.Class({
+    Name: 'SearchTab',
+    Extends: BaseTab,
 
     _init: function() {
         this.active = false;
@@ -136,11 +128,7 @@ SearchTab.prototype = {
         this._iconClickedId = 0;
 
         this._searchResults = new SearchDisplay.SearchResults(this._searchSystem, this._openSearchSystem);
-        BaseTab.prototype._init.call(this,
-                                     this._entry,
-                                     this._searchResults.actor,
-                                     _("Search"),
-                                     'edit-find');
+        this.parent(this._entry, this._searchResults.actor, _("Search"), 'edit-find');
 
         this._text.connect('text-changed', Lang.bind(this, this._onTextChanged));
         this._text.connect('key-press-event', Lang.bind(this, function (o, e) {
@@ -166,7 +154,7 @@ SearchTab.prototype = {
     },
 
     hide: function() {
-        BaseTab.prototype.hide.call(this);
+        this.parent();
 
         // Leave the entry focused when it doesn't have any text;
         // when replacing a selected search term, Clutter emits
@@ -310,7 +298,7 @@ SearchTab.prototype = {
 
         return false;
     }
-};
+});
 
 
 function ViewSelector() {