Standardize usage of virtual/override/final in net/

net/url_request/url_fetcher_core.h

Index: net/url_request/url_fetcher_core.h
diff --git a/net/url_request/url_fetcher_core.h b/net/url_request/url_fetcher_core.h
index c064a4213bfa88bdc145dda1a013791fc4bbbd4d..6bf449f5671ea4abeb666b1aaf867114941cf1f9 100644
--- a/net/url_request/url_fetcher_core.h
+++ b/net/url_request/url_fetcher_core.h
@@ -122,15 +122,13 @@ class URLFetcherCore
                              base::FilePath* out_response_path);
 
   // Overridden from URLRequest::Delegate:
-  virtual void OnReceivedRedirect(URLRequest* request,
-                                  const RedirectInfo& redirect_info,
-                                  bool* defer_redirect) override;
-  virtual void OnResponseStarted(URLRequest* request) override;
-  virtual void OnReadCompleted(URLRequest* request,
-                               int bytes_read) override;
-  virtual void OnCertificateRequested(
-      URLRequest* request,
-      SSLCertRequestInfo* cert_request_info) override;
+  void OnReceivedRedirect(URLRequest* request,
+                          const RedirectInfo& redirect_info,
+                          bool* defer_redirect) override;
+  void OnResponseStarted(URLRequest* request) override;
+  void OnReadCompleted(URLRequest* request, int bytes_read) override;
+  void OnCertificateRequested(URLRequest* request,
+                              SSLCertRequestInfo* cert_request_info) override;
 
   URLFetcherDelegate* delegate() const { return delegate_; }
   static void CancelAll();
@@ -161,7 +159,7 @@ class URLFetcherCore
     DISALLOW_COPY_AND_ASSIGN(Registry);
   };
 
-  virtual ~URLFetcherCore();
+  ~URLFetcherCore() override;
 
   // Wrapper functions that allow us to ensure actions happen on the right
   // thread.