DevTools: only allow status bar items in status bars.

Source/devtools/front_end/resources/DOMStorageItemsView.js

 /*
  * Copyright (C) 2008 Nokia Inc.  All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 33 matching lines @@
     this.refreshButton = new WebInspector.StatusBarButton(WebInspector.UIString("Refresh"), "refresh-storage-status-bar-item");
     this.refreshButton.addEventListener("click", this._refreshButtonClicked, this);
 
     this.domStorage.addEventListener(WebInspector.DOMStorage.Events.DOMStorageItemsCleared, this._domStorageItemsCleared, this);
     this.domStorage.addEventListener(WebInspector.DOMStorage.Events.DOMStorageItemRemoved, this._domStorageItemRemoved, this);
     this.domStorage.addEventListener(WebInspector.DOMStorage.Events.DOMStorageItemAdded, this._domStorageItemAdded, this);
     this.domStorage.addEventListener(WebInspector.DOMStorage.Events.DOMStorageItemUpdated, this._domStorageItemUpdated, this);
 }
 
 WebInspector.DOMStorageItemsView.prototype = {
-    get statusBarItems()
+    /**
+     * @return {!Array.<!WebInspector.StatusBarItem>}
+     */
+    statusBarItems: function()
     {
-        return [this.refreshButton.element, this.deleteButton.element];
+        return [this.refreshButton, this.deleteButton];
     },
 
     wasShown: function()
     {
         this._update();
     },
 
     willHide: function()
     {
         this.deleteButton.setVisible(false);
@@ skipping 185 matching lines @@
     {
         if (!node || node.isCreationNode)
             return;
 
         if (this.domStorage)
             this.domStorage.removeItem(node.data.key);
     },
 
     __proto__: WebInspector.VBox.prototype
 }