DevTools: only allow status bar items in status bars.

Source/devtools/front_end/resources/CookieItemsView.js

 /*
  * Copyright (C) 2009 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 40 matching lines @@
     this._treeElement = treeElement;
     this._cookieDomain = cookieDomain;
 
     this._emptyView = new WebInspector.EmptyView(WebInspector.UIString("This site has no cookies."));
     this._emptyView.show(this.element);
 
     this.element.addEventListener("contextmenu", this._contextMenu.bind(this), true);
 }
 
 WebInspector.CookieItemsView.prototype = {
-    get statusBarItems()
+    /**
+     * @return {!Array.<!WebInspector.StatusBarItem>}
+     */
+    statusBarItems: function()
     {
-        return [this._refreshButton.element, this._clearButton.element, this._deleteButton.element];
+        return [this._refreshButton, this._clearButton, this._deleteButton];
     },
 
     wasShown: function()
     {
         this._update();
     },
 
     willHide: function()
     {
         this._deleteButton.setVisible(false);
@@ skipping 104 matching lines @@
     {
         if (!this._cookies.length) {
             var contextMenu = new WebInspector.ContextMenu(event);
             contextMenu.appendItem(WebInspector.UIString("Refresh"), this._update.bind(this));
             contextMenu.show();
         }
     },
 
     __proto__: WebInspector.VBox.prototype
 }