Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

content/child/service_worker/service_worker_dispatcher.cc

 // Copyright 2013 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.
 
 #include "content/child/service_worker/service_worker_dispatcher.h"
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "content/child/service_worker/web_service_worker_impl.h"
 #include "content/child/thread_safe_sender.h"
@@ skipping 96 matching lines @@
 
   ServiceWorkerDispatcher* dispatcher =
       new ServiceWorkerDispatcher(thread_safe_sender);
   if (WorkerTaskRunner::Instance()->CurrentWorkerId())
     WorkerTaskRunner::Instance()->AddStopObserver(dispatcher);
   return dispatcher;
 }
 
 void ServiceWorkerDispatcher::OnRegistered(int32 thread_id,
                                            int32 request_id,
-                                           int64 version_id) {
+                                           int handle_id) {
   WebServiceWorkerProvider::WebServiceWorkerCallbacks* callbacks =
       pending_callbacks_.Lookup(request_id);
   DCHECK(callbacks);
   if (!callbacks)
     return;
 
   // the browser has to generate the registration_id so the same
   // worker can be called from different renderer contexts. However,
   // the impl object doesn't have to be the same instance across calls
   // unless we require the DOM objects to be identical when there's a
   // duplicate registration. So for now we mint a new object each
   // time.
   scoped_ptr<WebServiceWorkerImpl> worker(
-      new WebServiceWorkerImpl(version_id, thread_safe_sender_));
+      new WebServiceWorkerImpl(handle_id, thread_safe_sender_));
   callbacks->onSuccess(worker.release());
   pending_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerDispatcher::OnUnregistered(
     int32 thread_id,
     int32 request_id) {
   WebServiceWorkerProvider::WebServiceWorkerCallbacks* callbacks =
       pending_callbacks_.Lookup(request_id);
   DCHECK(callbacks);
@@ skipping 17 matching lines @@
 
   scoped_ptr<WebServiceWorkerError>  error(
       new WebServiceWorkerError(error_type, message));
   callbacks->onError(error.release());
   pending_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerDispatcher::OnWorkerRunLoopStopped() { delete this; }
 
 }  // namespace content