Implement memory-persistent registration

content/browser/service_worker/service_worker_version.h

+// Copyright (c) 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_VERSION_H_
+#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+
+class GURL;
+
+namespace content {
+
+class ServiceWorkerRegistration;
+
+// This class acts as a persistent instance
+class ServiceWorkerVersion {
+ public:
+  explicit ServiceWorkerVersion(
+      scoped_refptr<ServiceWorkerRegistration> registration);
+  ~ServiceWorkerVersion();
+
+ private:
+  friend class base::RefCountedThreadSafe<ServiceWorkerRegistration>;
+
+  scoped_refptr<ServiceWorkerRegistration> registration_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion);
+};
+}  // namespace content
+#endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_