Standardize usage of virtual/override/final in remoting/

remoting/protocol/third_party_client_authenticator.h

Index: remoting/protocol/third_party_client_authenticator.h
diff --git a/remoting/protocol/third_party_client_authenticator.h b/remoting/protocol/third_party_client_authenticator.h
index ac0bd950fac143a62e6ae6ae2bd6ea7013ea2d4c..53dcde8a3d0f05376c4765b57a65a5f3320e52d2 100644
--- a/remoting/protocol/third_party_client_authenticator.h
+++ b/remoting/protocol/third_party_client_authenticator.h
@@ -58,14 +58,13 @@ class ThirdPartyClientAuthenticator : public ThirdPartyAuthenticatorBase {
   // |host_public_key|. |token_fetcher| is used to get the authentication token.
   explicit ThirdPartyClientAuthenticator(
       scoped_ptr<TokenFetcher> token_fetcher);
-  virtual ~ThirdPartyClientAuthenticator();
+  ~ThirdPartyClientAuthenticator() override;
 
  protected:
   // ThirdPartyAuthenticator implementation.
-  virtual void ProcessTokenMessage(
-      const buzz::XmlElement* message,
-      const base::Closure& resume_callback) override;
-  virtual void AddTokenElements(buzz::XmlElement* message) override;
+  void ProcessTokenMessage(const buzz::XmlElement* message,
+                           const base::Closure& resume_callback) override;
+  void AddTokenElements(buzz::XmlElement* message) override;
 
  private:
   void OnThirdPartyTokenFetched(const base::Closure& resume_callback,