Update chrome://serviceworker-internals when ServiceWorker is unregistered.

content/browser/service_worker/service_worker_context_observer.h

 // Copyright 2014 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_
 
 #include "base/strings/string16.h"
 #include "url/gurl.h"
 
@@ skipping 40 matching lines @@
                                int thread_id) {}
   virtual void OnVersionStateChanged(int64 version_id) {}
   virtual void OnErrorReported(int64 version_id,
                                int process_id,
                                int thread_id,
                                const ErrorInfo& info) {}
   virtual void OnReportConsoleMessage(int64 version_id,
                                       int process_id,
                                       int thread_id,
                                       const ConsoleMessage& message) {}
+  virtual void OnRegistrationStored(const GURL& pattern) {}
+  virtual void OnRegistrationDeleted(const GURL& pattern) {}
 
  protected:
   virtual ~ServiceWorkerContextObserver() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_OBSERVER_H_