Standardize usage of virtual/override/final in content/browser/

content/browser/service_worker/service_worker_context_request_handler.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_CONTEXT_REQUEST_HANDLER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_REQUEST_HANDLER_H_
 
 #include "content/browser/service_worker/service_worker_request_handler.h"
 
 namespace content {
 
 class ServiceWorkerVersion;
 
 // A request handler derivative used to handle requests from
 // service workers.
 class CONTENT_EXPORT ServiceWorkerContextRequestHandler
     : public ServiceWorkerRequestHandler {
  public:
   ServiceWorkerContextRequestHandler(
       base::WeakPtr<ServiceWorkerContextCore> context,
       base::WeakPtr<ServiceWorkerProviderHost> provider_host,
       base::WeakPtr<storage::BlobStorageContext> blob_storage_context,
       ResourceType resource_type);
-  virtual ~ServiceWorkerContextRequestHandler();
+  ~ServiceWorkerContextRequestHandler() override;
 
   // Called via custom URLRequestJobFactory.
-  virtual net::URLRequestJob* MaybeCreateJob(
+  net::URLRequestJob* MaybeCreateJob(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate,
       ResourceContext* resource_context) override;
 
-  virtual void GetExtraResponseInfo(
+  void GetExtraResponseInfo(
       bool* was_fetched_via_service_worker,
       bool* was_fallback_required_by_service_worker,
       GURL* original_url_via_service_worker,
       blink::WebServiceWorkerResponseType* response_type_via_service_worker,
       base::TimeTicks* fetch_start_time,
       base::TimeTicks* fetch_ready_time,
       base::TimeTicks* fetch_end_time) const override;
 
  private:
   bool ShouldAddToScriptCache(const GURL& url);
   bool ShouldReadFromScriptCache(const GURL& url, int64* response_id_out);
 
   scoped_refptr<ServiceWorkerVersion> version_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_REQUEST_HANDLER_H_