Increase the lifetime of Navigation Preload related objects.

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 <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/optional.h"
 #include "base/time/time.h"
 #include "content/browser/service_worker/service_worker_metrics.h"
 #include "content/common/content_export.h"
 #include "content/common/service_worker/service_worker_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/common/url_loader.mojom.h"
 #include "content/common/url_loader_factory.mojom.h"
@@ skipping 21 matching lines @@
       std::unique_ptr<ServiceWorkerFetchRequest> request,
       ServiceWorkerVersion* version,
       ResourceType resource_type,
       const base::Optional<base::TimeDelta>& timeout,
       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);
+  // |preload_handle_|. Returns true if it started navigation preload.
+  bool 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;
+  class URLLoaderAssets;
 
   void DidWaitForActivation();
   void StartWorker();
   void DidStartWorker();
   void DidFailToStartWorker(ServiceWorkerStatusCode status);
   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);
 
+  static void OnFetchEventFinished(
+      ServiceWorkerVersion* version,
+      int event_finish_id,
+      scoped_refptr<URLLoaderAssets> url_loader_assets,
+      ServiceWorkerStatusCode status,
+      base::Time dispatch_event_time);
+
   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_;
   base::Optional<base::TimeDelta> timeout_;
   bool did_complete_;
-  mojom::URLLoaderFactoryPtr url_loader_factory_;
-  std::unique_ptr<mojom::URLLoader> url_loader_;
-  std::unique_ptr<mojom::URLLoaderClient> url_loader_client_;
+
+  scoped_refptr<URLLoaderAssets> url_loader_assets_;
+
   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_