Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/service_worker_provider_context.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_SERVICE_WORKER_PROVIDER_CONTEXT_H_
+#define CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_CONTEXT_H_
+
+#include <set>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/sequenced_task_runner_helpers.h"
+#include "base/synchronization/lock.h"
+#include "content/common/service_worker/service_worker_types.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace IPC {
+class Message;
+}
+
+namespace content {
+
+class ServiceWorkerHandleReference;
+struct ServiceWorkerProviderContextDeleter;
+class ThreadSafeSender;
+
+// An instance of this class holds document-related information (e.g.
+// .current). Created and destructed on the main thread.
+// TODO(kinuko): To support navigator.serviceWorker in dedicated workers
+// this needs to be RefCountedThreadSafe and .current info needs to be
+// handled in a thread-safe manner (e.g. by a lock etc).
+class ServiceWorkerProviderContext
+    : public base::RefCounted<ServiceWorkerProviderContext> {
+ public:
+  explicit ServiceWorkerProviderContext(int provider_id);
+
+  // Returns a new handle reference for .current.
+  scoped_ptr<ServiceWorkerHandleReference> GetCurrentServiceWorkerHandle();
+
+  // Called from ServiceWorkerDispatcher.
+  void OnServiceWorkerStateChanged(int handle_id,
+                                   blink::WebServiceWorkerState state);
+  void OnSetCurrentServiceWorker(int provider_id,
+                                 const ServiceWorkerObjectInfo& info);
+
+  int provider_id() const { return provider_id_; }
+  int current_handle_id() const;
+
+ private:
+  friend class base::RefCounted<ServiceWorkerProviderContext>;
+  ~ServiceWorkerProviderContext();
+
+  const int provider_id_;
+  scoped_refptr<base::MessageLoopProxy> main_thread_loop_proxy_;
+  scoped_refptr<ThreadSafeSender> thread_safe_sender_;
+  scoped_ptr<ServiceWorkerHandleReference> current_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerProviderContext);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_CONTEXT_H_