ServiceWorker: Introduce SWMessageSender in order to mock IPC messaging

content/child/service_worker/web_service_worker_provider_impl.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_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_
 #define CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerProvider.h"
 
 namespace blink {
 class WebURL;
 class WebServiceWorkerProviderClient;
 }
 
 namespace content {
 
 class ServiceWorkerDispatcher;
+class ServiceWorkerMessageSender;
 class ServiceWorkerProviderContext;
 class ThreadSafeSender;
 
 // This class corresponds to one ServiceWorkerContainer interface in
 // JS context (i.e. navigator.serviceWorker).
 class WebServiceWorkerProviderImpl
     : NON_EXPORTED_BASE(public blink::WebServiceWorkerProvider) {
  public:
   WebServiceWorkerProviderImpl(ThreadSafeSender* thread_safe_sender,
                                ServiceWorkerProviderContext* context);
@@ skipping 15 matching lines @@
       WebServiceWorkerGetRegistrationForReadyCallbacks*);
 
   ServiceWorkerProviderContext* context() { return context_.get(); }
 
   int provider_id() const { return provider_id_; }
 
  private:
   void RemoveProviderClient();
   ServiceWorkerDispatcher* GetDispatcher();
 
-  scoped_refptr<ThreadSafeSender> thread_safe_sender_;
+  scoped_refptr<ServiceWorkerMessageSender> sender_;
   scoped_refptr<ServiceWorkerProviderContext> context_;
   const int provider_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WebServiceWorkerProviderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_