Crash when trying to close chrome://inspect

chrome/browser/ui/webui/inspect_ui.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_ui_controller.h"
 
 class InspectUI : public content::WebUIController,
                   public content::NotificationObserver {
  public:
   explicit InspectUI(content::WebUI* web_ui);
   virtual ~InspectUI();
 
   void RefreshUI();
 
  private:
   class WorkerCreationDestructionListener;
 
   // content::NotificationObserver overrides.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  void StopListeningNotifications();
+
   scoped_refptr<WorkerCreationDestructionListener> observer_;
 
   // A scoped container for notification registries.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(InspectUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_INSPECT_UI_H_