Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/scoped_service_worker_reference.h

+// Copyright 2014 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_CHILD_SERVICE_WORKER_SCOPED_SERVICE_WORKER_REFERENCE_H_
+#define CONTENT_CHILD_SERVICE_WORKER_SCOPED_SERVICE_WORKER_REFERENCE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/common/service_worker/service_worker_types.h"
+
+namespace content {
+
+class ThreadSafeSender;
+
+// Automatically increments and decrement ServiceWorker's ref-count (in the

[michaeln, 2014/05/01 01:25:18]

there are lots of classes so it would help to be real clear in the comment about
exactly what browser-side class this directly related to. i think that's the
ServerWorkerHandle class. to help readers make that connection maybe name this
class ServiceWorkerHandleReference?

[kinuko, 2014/05/02 10:00:56]

Sg, done.

+// browser side) in ctor and dtor.
+class ScopedServiceWorkerReference {
+ public:
+  // Creates a new ScopedServiceWorkerReference (and increments ref-count).
+  static scoped_ptr<ScopedServiceWorkerReference> Create(
+      const ServiceWorkerObjectInfo& info,
+      ThreadSafeSender* sender);
+  // This doesn't increment ref-count in ctor.
+  static scoped_ptr<ScopedServiceWorkerReference> CreateForDeleter(
+      const ServiceWorkerObjectInfo& info,
+      ThreadSafeSender* sender);
+
+  ~ScopedServiceWorkerReference();
+
+  const ServiceWorkerObjectInfo& info() const { return info_; }
+  int handle_id() const { return info_.handle_id; }
+  const GURL& scope() const { return info_.scope; }
+  const GURL& url() const { return info_.url; }
+  blink::WebServiceWorkerState state() const { return info_.state; }
+  void set_state(blink::WebServiceWorkerState state) { info_.state = state; }
+
+ private:
+  ScopedServiceWorkerReference(const ServiceWorkerObjectInfo& info,
+                               ThreadSafeSender* sender,
+                               bool increment_ref_in_ctor);
+  ServiceWorkerObjectInfo info_;
+  scoped_refptr<ThreadSafeSender> sender_;
+  DISALLOW_COPY_AND_ASSIGN(ScopedServiceWorkerReference);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_SERVICE_WORKER_SCOPED_SERVICE_WORKER_REFERENCE_H_