DevTools: do not allow using 'this' before call into super.

third_party/WebKit/Source/devtools/front_end/ui/View.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @interface
  */
 WebInspector.View = function()
 {
 };
@@ skipping 585 matching lines @@
  * @extends {WebInspector.ViewManager._Location}
  * @implements {WebInspector.TabbedViewLocation}
  * @param {!WebInspector.ViewManager} manager
  * @param {function()=} revealCallback
  * @param {string=} location
  * @param {boolean=} restoreSelection
  * @param {boolean=} allowReorder
  */
 WebInspector.ViewManager._TabbedLocation = function(manager, revealCallback, location, restoreSelection, allowReorder)
 {
-    this._tabbedPane = new WebInspector.TabbedPane();
+    var tabbedPane = new WebInspector.TabbedPane();
     if (allowReorder)
-        this._tabbedPane.setAllowTabReorder(true);
+        tabbedPane.setAllowTabReorder(true);
+
+    WebInspector.ViewManager._Location.call(this, manager, tabbedPane, revealCallback);
+    this._tabbedPane = tabbedPane;
     this._allowReorder = allowReorder;
-    WebInspector.ViewManager._Location.call(this, manager, this._tabbedPane, revealCallback);
 
     this._tabbedPane.addEventListener(WebInspector.TabbedPane.Events.TabSelected, this._tabSelected, this);
     this._tabbedPane.addEventListener(WebInspector.TabbedPane.Events.TabClosed, this._tabClosed, this);
     this._closeableTabSetting = WebInspector.settings.createSetting(location + "-closeableTabs", {});
     this._tabOrderSetting = WebInspector.settings.createSetting(location + "-tabOrder", {});
     this._tabbedPane.addEventListener(WebInspector.TabbedPane.Events.TabOrderChanged, this._persistTabOrder, this);
     if (restoreSelection)
         this._lastSelectedTabSetting = WebInspector.settings.createSetting(location + "-selectedTab", "");
 
     /** @type {!Map.<string, !WebInspector.View>} */
@@ skipping 213 matching lines @@
 /**
  * @constructor
  * @extends {WebInspector.ViewManager._Location}
  * @implements {WebInspector.ViewLocation}
  * @param {!WebInspector.ViewManager} manager
  * @param {function()=} revealCallback
  * @param {string=} location
  */
 WebInspector.ViewManager._StackLocation = function(manager, revealCallback, location)
 {
-    this._vbox = new WebInspector.VBox();
-    WebInspector.ViewManager._Location.call(this, manager, this._vbox, revealCallback);
+    var vbox = new WebInspector.VBox();
+    WebInspector.ViewManager._Location.call(this, manager, vbox, revealCallback);
+    this._vbox = vbox;
 
     /** @type {!Map<string, !WebInspector.ViewManager._ExpandableContainerWidget>} */
     this._expandableContainers = new Map();
 
     if (location)
         this.appendApplicableItems(location);
 };
 
 WebInspector.ViewManager._StackLocation.prototype = {
 
@@ skipping 58 matching lines @@
             this.appendView(view);
     },
 
     __proto__: WebInspector.ViewManager._Location.prototype
 };
 
 /**
  * @type {!WebInspector.ViewManager}
  */
 WebInspector.viewManager;