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

chromeos/login/auth/extended_authenticator_impl.h

Index: chromeos/login/auth/extended_authenticator_impl.h
diff --git a/chromeos/login/auth/extended_authenticator_impl.h b/chromeos/login/auth/extended_authenticator_impl.h
index 103cbd2548084bdb3f69c5050e43f71b424c183f..519c1febc9780bcb4b610fb40a98df533058cac0 100644
--- a/chromeos/login/auth/extended_authenticator_impl.h
+++ b/chromeos/login/auth/extended_authenticator_impl.h
@@ -27,33 +27,30 @@ class CHROMEOS_EXPORT ExtendedAuthenticatorImpl : public ExtendedAuthenticator {
   explicit ExtendedAuthenticatorImpl(AuthStatusConsumer* consumer);
 
   // ExtendedAuthenticator:
-  virtual void SetConsumer(AuthStatusConsumer* consumer) override;
-  virtual void AuthenticateToMount(
-      const UserContext& context,
-      const ResultCallback& success_callback) override;
-  virtual void AuthenticateToCheck(
-      const UserContext& context,
-      const base::Closure& success_callback) override;
-  virtual void CreateMount(const std::string& user_id,
-                           const std::vector<cryptohome::KeyDefinition>& keys,
+  void SetConsumer(AuthStatusConsumer* consumer) override;
+  void AuthenticateToMount(const UserContext& context,
                            const ResultCallback& success_callback) override;
-  virtual void AddKey(const UserContext& context,
-                      const cryptohome::KeyDefinition& key,
-                      bool replace_existing,
-                      const base::Closure& success_callback) override;
-  virtual void UpdateKeyAuthorized(
-      const UserContext& context,
-      const cryptohome::KeyDefinition& key,
-      const std::string& signature,
-      const base::Closure& success_callback) override;
-  virtual void RemoveKey(const UserContext& context,
-                         const std::string& key_to_remove,
-                         const base::Closure& success_callback) override;
-  virtual void TransformKeyIfNeeded(const UserContext& user_context,
-                                    const ContextCallback& callback) override;
+  void AuthenticateToCheck(const UserContext& context,
+                           const base::Closure& success_callback) override;
+  void CreateMount(const std::string& user_id,
+                   const std::vector<cryptohome::KeyDefinition>& keys,
+                   const ResultCallback& success_callback) override;
+  void AddKey(const UserContext& context,
+              const cryptohome::KeyDefinition& key,
+              bool replace_existing,
+              const base::Closure& success_callback) override;
+  void UpdateKeyAuthorized(const UserContext& context,
+                           const cryptohome::KeyDefinition& key,
+                           const std::string& signature,
+                           const base::Closure& success_callback) override;
+  void RemoveKey(const UserContext& context,
+                 const std::string& key_to_remove,
+                 const base::Closure& success_callback) override;
+  void TransformKeyIfNeeded(const UserContext& user_context,
+                            const ContextCallback& callback) override;
 
  private:
-  virtual ~ExtendedAuthenticatorImpl();
+  ~ExtendedAuthenticatorImpl() override;
 
   // Callback for system salt getter.
   void OnSaltObtained(const std::string& system_salt);