ServiceWorker: Make GetOrCreateRegistrationHandle for refactoring

content/browser/service_worker/service_worker_dispatcher_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DISPATCHER_HOST_H_
 
 #include <vector>
 
 #include "base/id_map.h"
@@ skipping 29 matching lines @@
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // IPC::Sender implementation
 
   // Send() queues the message until the underlying sender is ready.  This
   // class assumes that Send() can only fail after that when the renderer
   // process has terminated, at which point the whole instance will eventually
   // be destroyed.
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
+  // Returns the existing registration handle whose reference count is
+  // incremented or newly created one if it doesn't exist.
+  ServiceWorkerRegistrationHandle* GetOrCreateRegistrationHandle(
+      int provider_id,
+      ServiceWorkerRegistration* registration);
+
   void RegisterServiceWorkerHandle(scoped_ptr<ServiceWorkerHandle> handle);
   void RegisterServiceWorkerRegistrationHandle(
       scoped_ptr<ServiceWorkerRegistrationHandle> handle);
 
   MessagePortMessageFilter* message_port_message_filter() {
     return message_port_message_filter_;
   }
 
  protected:
   virtual ~ServiceWorkerDispatcherHost();
@@ skipping 77 matching lines @@
 
   bool channel_ready_;  // True after BrowserMessageFilter::sender_ != NULL.
   ScopedVector<IPC::Message> pending_messages_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DISPATCHER_HOST_H_