Stub out ServiceWorkerRegistration and Version classes

content/browser/service_worker/service_worker_version.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_version.h"
+
+#include "content/browser/service_worker/service_worker_registration.h"
+
+namespace content {
+
+ServiceWorkerVersion::ServiceWorkerVersion(
+    ServiceWorkerRegistration* registration)
+    : is_shutdown_(false), registration_(registration) {}
+
+ServiceWorkerVersion::~ServiceWorkerVersion() { DCHECK(is_shutdown_); }
+
+void ServiceWorkerVersion::Shutdown() {
+  is_shutdown_ = true;
+  registration_ = NULL;
+}
+
+}  // namespace content