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

third_party/WebKit/Source/devtools/front_end/components/ObjectPopoverHelper.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
  * @constructor
  * @extends {WebInspector.PopoverHelper}
  * @param {!Element} panelElement
  * @param {function(!Element, !Event):(!Element|!AnchorBox|undefined)} getAnchor
  * @param {function(!Element, function(!WebInspector.RemoteObject, boolean, !Element=):undefined, string):undefined} queryObject
  * @param {function()=} onHide
  * @param {boolean=} disableOnClick
  */
 WebInspector.ObjectPopoverHelper = function(panelElement, getAnchor, queryObject, onHide, disableOnClick)
 {
-    WebInspector.PopoverHelper.call(this, panelElement, getAnchor, this._showObjectPopover.bind(this), this._onHideObjectPopover.bind(this), disableOnClick);
+    WebInspector.PopoverHelper.call(this, panelElement, disableOnClick);
+    this.initializeCallbacks(getAnchor, this._showObjectPopover.bind(this), this._onHideObjectPopover.bind(this));
     this._queryObject = queryObject;
     this._onHideCallback = onHide;
     this._popoverObjectGroup = "popover";
     panelElement.addEventListener("scroll", this.hidePopover.bind(this), true);
 };
 
 WebInspector.ObjectPopoverHelper.MaxPopoverTextLength = 10000;
 
 WebInspector.ObjectPopoverHelper.prototype = {
     /**
@@ skipping 140 matching lines @@
      */
     _lazyLinkifier: function()
     {
         if (!this._linkifier)
             this._linkifier = new WebInspector.Linkifier();
         return this._linkifier;
     },
 
     __proto__: WebInspector.PopoverHelper.prototype
 };