[proof-of-concept] SW thread independent of the main thread

content/browser/service_worker/service_worker_fetch_dispatcher.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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/service_worker/service_worker_metrics.h"
 #include "content/common/content_export.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/common/resource_type.h"
 #include "net/log/net_log.h"
+#include "mojo/public/cpp/bindings/string.h"
+#include "mojo/public/cpp/bindings/struct_ptr.h"
 
+namespace blink {
+namespace mojom {
+class ServiceWorkerResponse;
+}
+}
 namespace content {
 
 class ServiceWorkerVersion;
 
 // A helper class to dispatch fetch event to a service worker.
 class CONTENT_EXPORT ServiceWorkerFetchDispatcher {
  public:
   typedef base::Callback<void(ServiceWorkerStatusCode,
                               ServiceWorkerFetchEventResult,
                               const ServiceWorkerResponse&,
@@ skipping 25 matching lines @@
   void DispatchFetchEvent();
   void DidFailToDispatch(ServiceWorkerStatusCode status);
   void DidFail(ServiceWorkerStatusCode status);
   void DidFinish(int request_id,
                  ServiceWorkerFetchEventResult fetch_result,
                  const ServiceWorkerResponse& response);
   void Complete(ServiceWorkerStatusCode status,
                 ServiceWorkerFetchEventResult fetch_result,
                 const ServiceWorkerResponse& response);
 
+  void OnFetchEventCallback(
+      bool handled,
+      mojo::StructPtr<blink::mojom::ServiceWorkerResponse> response);
+
   ServiceWorkerMetrics::EventType GetEventType() const;
 
   scoped_refptr<ServiceWorkerVersion> version_;
   net::BoundNetLog net_log_;
   base::Closure prepare_callback_;
   FetchCallback fetch_callback_;
   std::unique_ptr<ServiceWorkerFetchRequest> request_;
   ResourceType resource_type_;
   bool did_complete_;
   base::WeakPtrFactory<ServiceWorkerFetchDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerFetchDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_