Standardize usage of virtual/override/final in remoting/

remoting/host/oauth_token_getter.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 REMOTING_HOST_OAUTH_TOKEN_GETTER_H_
 #define REMOTING_HOST_OAUTH_TOKEN_GETTER_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
@@ skipping 42 matching lines @@
     std::string refresh_token;
 
     // Whether these credentials belong to a service account.
     bool is_service_account;
   };
 
   OAuthTokenGetter(
       scoped_ptr<OAuthCredentials> oauth_credentials,
       scoped_refptr<net::URLRequestContextGetter> url_request_context_getter,
       bool auto_refresh);
-  virtual ~OAuthTokenGetter();
+  ~OAuthTokenGetter() override;
 
   // Call |on_access_token| with an access token, or the failure status.
   void CallWithToken(const OAuthTokenGetter::TokenCallback& on_access_token);
 
   // gaia::GaiaOAuthClient::Delegate interface.
-  virtual void OnGetTokensResponse(const std::string& user_email,
-                                   const std::string& access_token,
-                                   int expires_seconds) override;
-  virtual void OnRefreshTokenResponse(const std::string& access_token,
-                                      int expires_in_seconds) override;
-  virtual void OnGetUserEmailResponse(const std::string& user_email) override;
-  virtual void OnOAuthError() override;
-  virtual void OnNetworkError(int response_code) override;
+  void OnGetTokensResponse(const std::string& user_email,
+                           const std::string& access_token,
+                           int expires_seconds) override;
+  void OnRefreshTokenResponse(const std::string& access_token,
+                              int expires_in_seconds) override;
+  void OnGetUserEmailResponse(const std::string& user_email) override;
+  void OnOAuthError() override;
+  void OnNetworkError(int response_code) override;
 
  private:
   void NotifyCallbacks(Status status,
                        const std::string& user_email,
                        const std::string& access_token);
   void RefreshOAuthToken();
 
   scoped_ptr<OAuthCredentials> oauth_credentials_;
   scoped_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
 
   bool refreshing_oauth_token_;
   std::string oauth_access_token_;
   std::string verified_email_;
   base::Time auth_token_expiry_time_;
   std::queue<OAuthTokenGetter::TokenCallback> pending_callbacks_;
   scoped_ptr<base::OneShotTimer<OAuthTokenGetter> > refresh_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuthTokenGetter);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_OAUTH_TOKEN_GETTER_H_