Implement memory-persistent registration

content/browser/service_worker/service_worker_registration.cc

+// 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.
+
+#include "content/browser/service_worker/service_worker_registration.h"
+
+namespace content {
+
+ServiceWorkerRegistration::ServiceWorkerRegistration(const GURL& pattern,
+                                                     const GURL& script_url,
+                                                     int32 registration_id)
+    : pattern_(pattern),
+      script_url_(script_url),
+      registration_id_(registration_id),
+      is_shutdown_(true) {}
+
+ServiceWorkerRegistration::~ServiceWorkerRegistration() { Shutdown(); }
+
+void ServiceWorkerRegistration::Shutdown() {
+  active_version_.reset();
+  in_waiting_version_.reset();
+  is_shutdown_ = true;
+}
+}  // namespace content