Stub out ServiceWorkerRegistration and Version classes

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"
+
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+ServiceWorkerRegistration::ServiceWorkerRegistration(const GURL& pattern,
+                                                     const GURL& script_url,
+                                                     int64 registration_id)
+    : pattern_(pattern),
+      script_url_(script_url),
+      registration_id_(registration_id),
+      is_shutdown_(false) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+}
+
+ServiceWorkerRegistration::~ServiceWorkerRegistration() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  Shutdown();

[michaeln, 2013/11/14 22:30:55]

not sure this call needs to be here, if there is an active or pending version,
then we wouldn't be here because of the ref the version holds on 'this'

+}
+
+void ServiceWorkerRegistration::Shutdown() {

[michaeln, 2013/11/14 22:30:55]

maybe if (shutdown_) return

[alecflett, 2013/11/15 01:51:39]

I'll DCHECK() and if we ever get into a situation where we're calling Shutdown()
twice, we can re-check our assumptions.

+  if (active_version_)
+    active_version_->Shutdown();
+  active_version_ = NULL;
+  if (pending_version_)
+    pending_version_->Shutdown();
+  pending_version_ = NULL;
+  is_shutdown_ = true;
+}
+
+void ServiceWorkerRegistration::ActivatePendingVersion() {
+  active_version_->Shutdown();
+  active_version_ = pending_version_;
+  pending_version_ = NULL;
+}
+
+}  // namespace content