Add IPC stubs between browser and ServiceWorker's worker context in the child process

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(int embedded_worker_id,
-                             int64 service_worker_version_id,
-                             const GURL& script_url);
-
-  virtual ~ServiceWorkerContextClient();
-
-  bool OnMessageReceived(const IPC::Message& msg);
-
-  // WebServiceWorkerContextClient overrides.
-  virtual void workerContextFailedToStart();
-  virtual void workerContextStarted(blink::WebServiceWorkerContextProxy* proxy);
-  virtual void workerContextDestroyed();
-
-  // TODO: Implement DevTools related method overrides.
-
-  int embedded_worker_id() const { return embedded_worker_id_; }
-
- private:
-  const int 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_