Introduce FetchEventPreloadHandle to pass the preload response to FetchEvent.

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/fetch_event_dispatcher.mojom.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_with_source.h"
 
+namespace net {
+class URLRequest;
+}  // namespace net
+
 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&,
                               const scoped_refptr<ServiceWorkerVersion>&)>
       FetchCallback;
 
   ServiceWorkerFetchDispatcher(
       std::unique_ptr<ServiceWorkerFetchRequest> request,
       ServiceWorkerVersion* version,
       ResourceType resource_type,
       const net::NetLogWithSource& net_log,
       const base::Closure& prepare_callback,
       const FetchCallback& fetch_callback);
   ~ServiceWorkerFetchDispatcher();
 
+  // If appropriate, starts the navigation preload request and creates
+  // |preload_handle_|.
+  void MaybeStartNavigationPreload(net::URLRequest* original_request);
+
   // Dispatches a fetch event to the |version| given in ctor, and fires
   // |fetch_callback| (also given in ctor) when finishes. It runs
   // |prepare_callback| as an intermediate step once the version is activated
   // and running.
   void Run();
 
  private:
   class ResponseCallback;
 
   void DidWaitForActivation();
@@ skipping 12 matching lines @@
 
   ServiceWorkerMetrics::EventType GetEventType() const;
 
   scoped_refptr<ServiceWorkerVersion> version_;
   net::NetLogWithSource net_log_;
   base::Closure prepare_callback_;
   FetchCallback fetch_callback_;
   std::unique_ptr<ServiceWorkerFetchRequest> request_;
   ResourceType resource_type_;
   bool did_complete_;
+  mojom::FetchEventPreloadHandlePtr preload_handle_;
+
   base::WeakPtrFactory<ServiceWorkerFetchDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerFetchDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_FETCH_DISPATCHER_H_