Update {virtual,override,final} to follow C++11 style in chromeos.

chromeos/login/auth/online_attempt.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 CHROMEOS_LOGIN_AUTH_ONLINE_ATTEMPT_H_
 #define CHROMEOS_LOGIN_AUTH_ONLINE_ATTEMPT_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 13 matching lines @@
 }
 
 namespace chromeos {
 class AuthAttemptState;
 class AuthAttemptStateResolver;
 
 class CHROMEOS_EXPORT OnlineAttempt : public GaiaAuthConsumer {
  public:
   OnlineAttempt(AuthAttemptState* current_attempt,
                 AuthAttemptStateResolver* callback);
-  virtual ~OnlineAttempt();
+  ~OnlineAttempt() override;
 
   // Initiate the online login attempt either through client or auth login.
   // Status will be recorded in |current_attempt|, and resolver_->Resolve() will
   // be called on the IO thread when useful state is available.
   // Must be called on the UI thread.
   void Initiate(net::URLRequestContextGetter* request_context);
 
   // GaiaAuthConsumer overrides. Callbacks from GaiaAuthFetcher
-  virtual void OnClientLoginFailure(
-      const GoogleServiceAuthError& error) override;
-  virtual void OnClientLoginSuccess(
+  void OnClientLoginFailure(const GoogleServiceAuthError& error) override;
+  void OnClientLoginSuccess(
       const GaiaAuthConsumer::ClientLoginResult& credentials) override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(OnlineAttemptTest, LoginSuccess);
   FRIEND_TEST_ALL_PREFIXES(OnlineAttemptTest, TwoFactorSuccess);
 
   // Milliseconds until we timeout our attempt to hit ClientLogin.
   static const int kClientLoginTimeoutMs;
 
   void TryClientLogin();
@@ skipping 18 matching lines @@
   // Used to cancel the CancelClientLogin closure.
   base::WeakPtrFactory<OnlineAttempt> weak_factory_;
 
   friend class OnlineAttemptTest;
   DISALLOW_COPY_AND_ASSIGN(OnlineAttempt);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_LOGIN_AUTH_ONLINE_ATTEMPT_H_