M57: Add UseCounter for ServiceWorkerNavigationPreload.

content/browser/service_worker/service_worker_url_request_job.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_URL_REQUEST_JOB_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_URL_REQUEST_JOB_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 83 matching lines @@
       RequestContextType request_context_type,
       RequestContextFrameType frame_type,
       scoped_refptr<ResourceRequestBodyImpl> body,
       ServiceWorkerFetchType fetch_type,
       const base::Optional<base::TimeDelta>& timeout,
       Delegate* delegate);
 
   ~ServiceWorkerURLRequestJob() override;
 
   const ResourceContext* resource_context() const { return resource_context_; }
+  bool did_navigation_preload() const { return did_navigation_preload_; }
 
   // Sets the response type.
   // When an in-flight request possibly needs CORS check, use
   // FallbackToNetworkOrRenderer. This method will decide whether the request
   // can directly go to the network or should fallback to a renderer to send
   // CORS preflight. You can use FallbackToNetwork only when, like main resource
   // or foreign fetch cases, it's apparent that the request should go to the
   // network directly.
   // TODO(shimazu): Update the comment when what should we do at foreign fetch
   // fallback is determined: crbug.com/604084
@@ skipping 217 matching lines @@
   std::unique_ptr<FileSizeResolver> file_size_resolver_;
 
   base::WeakPtrFactory<ServiceWorkerURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerURLRequestJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_URL_REQUEST_JOB_H_