Standardize usage of virtual/override/final in components/

components/signin/core/browser/webdata/token_web_data.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.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__
 #define COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__
@@ skipping 41 matching lines @@
   // Removes a token related to |service| from the web database.
   void RemoveTokenForService(const std::string& service);
 
   // Null on failure. Success is WDResult<std::vector<std::string> >
   virtual Handle GetAllTokens(WebDataServiceConsumer* consumer);
 
  protected:
   // For unit tests, passes a null callback.
   TokenWebData();
 
-  virtual ~TokenWebData();
+  ~TokenWebData() override;
 
  private:
   scoped_refptr<TokenWebDataBackend> token_backend_;
 
   DISALLOW_COPY_AND_ASSIGN(TokenWebData);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__