Standardize usage of virtual/override/final in net/

net/ssl/client_cert_store_mac.h

Index: net/ssl/client_cert_store_mac.h
diff --git a/net/ssl/client_cert_store_mac.h b/net/ssl/client_cert_store_mac.h
index 5c697dbd58dd105224378eef3ae1e9ff9ee32e2f..23e3a2f958c465df0a85972310b740b306335777 100644
--- a/net/ssl/client_cert_store_mac.h
+++ b/net/ssl/client_cert_store_mac.h
@@ -17,12 +17,12 @@ namespace net {
 class NET_EXPORT ClientCertStoreMac : public ClientCertStore {
  public:
   ClientCertStoreMac();
-  virtual ~ClientCertStoreMac();
+  ~ClientCertStoreMac() override;
 
   // ClientCertStore:
-  virtual void GetClientCerts(const SSLCertRequestInfo& cert_request_info,
-                              CertificateList* selected_certs,
-                              const base::Closure& callback) override;
+  void GetClientCerts(const SSLCertRequestInfo& cert_request_info,
+                      CertificateList* selected_certs,
+                      const base::Closure& callback) override;
 
  private:
   friend class ClientCertStoreMacTest;