Standardize usage of virtual/override/final in chrome/

chrome/common/ini_parser.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 CHROME_COMMON_INI_PARSER_H_
 #define CHROME_COMMON_INI_PARSER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
                              const std::string& value) = 0;
 
   bool used_;
 };
 
 // Parsed values are stored as strings at the "section.key" path. Triplets with
 // |section| or |key| parameters containing '.' are ignored.
 class DictionaryValueINIParser : public INIParser {
  public:
   DictionaryValueINIParser();
-  virtual ~DictionaryValueINIParser();
+  ~DictionaryValueINIParser() override;
 
   const base::DictionaryValue& root() const { return root_; }
 
  private:
   // INIParser implementation.
-  virtual void HandleTriplet(const std::string& section,
-                             const std::string& key,
-                             const std::string& value) override;
+  void HandleTriplet(const std::string& section,
+                     const std::string& key,
+                     const std::string& value) override;
 
   base::DictionaryValue root_;
 
   DISALLOW_COPY_AND_ASSIGN(DictionaryValueINIParser);
 };
 
 #endif  // CHROME_COMMON_INI_PARSER_H_