Standardize usage of virtual/override/final in components/

components/signin/core/browser/signin_oauth_helper.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 COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_OAUTH_HELPER_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_OAUTH_HELPER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 20 matching lines @@
 
     // Called when an error occurs while getting the information.
     virtual void OnSigninOAuthInformationFailure(
         const GoogleServiceAuthError& error) {}
   };
 
   explicit SigninOAuthHelper(net::URLRequestContextGetter* getter,
                              const std::string& session_index,
                              const std::string& signin_scoped_device_id,
                              Consumer* consumer);
-  virtual ~SigninOAuthHelper();
+  ~SigninOAuthHelper() override;
 
  private:
   // Overridden from GaiaAuthConsumer.
-  virtual void OnClientOAuthSuccess(const ClientOAuthResult& result) override;
-  virtual void OnClientOAuthFailure(const GoogleServiceAuthError& error)
-      override;
-  virtual void OnClientLoginSuccess(const ClientLoginResult& result) override;
-  virtual void OnClientLoginFailure(const GoogleServiceAuthError& error)
-      override;
-  virtual void OnGetUserInfoSuccess(const UserInfoMap& data) override;
-  virtual void OnGetUserInfoFailure(const GoogleServiceAuthError& error)
-      override;
+  void OnClientOAuthSuccess(const ClientOAuthResult& result) override;
+  void OnClientOAuthFailure(const GoogleServiceAuthError& error) override;
+  void OnClientLoginSuccess(const ClientLoginResult& result) override;
+  void OnClientLoginFailure(const GoogleServiceAuthError& error) override;
+  void OnGetUserInfoSuccess(const UserInfoMap& data) override;
+  void OnGetUserInfoFailure(const GoogleServiceAuthError& error) override;
 
   GaiaAuthFetcher gaia_auth_fetcher_;
   std::string refresh_token_;
   Consumer* consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninOAuthHelper);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_OAUTH_HELPER_H_