Initial child-process side plumbing for starting an embedded ServiceWorker context

content/renderer/service_worker/service_worker_context_client.h

+// Copyright 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.
+
+#ifndef CONTENT_CHILD_SERVICE_WORKER_EMBEDDED_WORKER_CLIENT_H_
+#define CONTENT_CHILD_SERVICE_WORKER_EMBEDDED_WORKER_CLIENT_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/strings/string16.h"
+#include "ipc/ipc_listener.h"
+#include "third_party/WebKit/public/web/WebServiceWorkerContextClient.h"
+#include "url/gurl.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace content {
+
+class ThreadSafeSender;
+
+// This class provides access to/from an embedded worker's WorkerGlobalScope.
+// All methods other than the constructor (it's created on the main thread)
+// are called on the worker thread.
+class ServiceWorkerContextClient
+    : public blink::WebServiceWorkerContextClient {
+ public:
+  // Returns a thread-specific client instance.  This does NOT create a
+  // new instance.
+  static ServiceWorkerContextClient* ThreadSpecificInstance();
+
+  ServiceWorkerContextClient(int32 embedded_worker_id,
+                             int64 service_worker_version_id,
+                             const GURL& script_url);
+
+  virtual ~ServiceWorkerContextClient();
+
+  void OnMessageReceived(const IPC::Message& msg);
+
+  // WebServiceWorkerContextClient overrides.
+  virtual void workerContextStarted(blink::WebServiceWorkerContextProxy* proxy);
+  virtual void workerContextClosed();
+  virtual void workerContextDestroyed();
+
+  // TODO: Implement DevTools related method overrides.
+
+  int embedded_worker_id() const { return embedded_worker_id_; }
+
+ private:
+  const int32 embedded_worker_id_;
+  const int64 service_worker_version_id_;
+  const GURL script_url_;
+  scoped_refptr<ThreadSafeSender> sender_;
+  scoped_refptr<base::MessageLoopProxy> main_thread_proxy_;
+
+  blink::WebServiceWorkerContextProxy* proxy_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextClient);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_SERVICE_WORKER_EMBEDDED_WORKER_CLIENT_H_