Standardize usage of virtual/override/final in net/

net/url_request/url_request_filter.h

Index: net/url_request/url_request_filter.h
diff --git a/net/url_request/url_request_filter.h b/net/url_request/url_request_filter.h
index 3388d92dc7d3b165b43dab42725c7f308f9c6dd2..4366dbdff5c4e29c81a05996a867361e41c34926 100644
--- a/net/url_request/url_request_filter.h
+++ b/net/url_request/url_request_filter.h
@@ -67,7 +67,7 @@ class NET_EXPORT URLRequestFilter : public URLRequestInterceptor {
   int hit_count() const { return hit_count_; }
 
   // URLRequestInterceptor implementation:
-  virtual URLRequestJob* MaybeInterceptRequest(
+  URLRequestJob* MaybeInterceptRequest(
       URLRequest* request,
       NetworkDelegate* network_delegate) const override;
 
@@ -79,7 +79,7 @@ class NET_EXPORT URLRequestFilter : public URLRequestInterceptor {
   typedef base::hash_map<std::string, URLRequestInterceptor*> URLInterceptorMap;
 
   URLRequestFilter();
-  virtual ~URLRequestFilter();
+  ~URLRequestFilter() override;
 
   // Maps hostnames to interceptors.  Hostnames take priority over URLs.
   HostnameInterceptorMap hostname_interceptor_map_;