Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/predictors/logged_in_predictor_table.h

 // Copyright (c) 2013 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_BROWSER_PREDICTORS_LOGGED_IN_PREDICTOR_TABLE_H_
 #define CHROME_BROWSER_PREDICTORS_LOGGED_IN_PREDICTOR_TABLE_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 31 matching lines @@
                                const base::Time& delete_end);
   void GetAllData(LoggedInStateMap* state_map);
 
   static std::string GetKey(const GURL& url);
   static std::string GetKeyFromDomain(const std::string& domain);
 
  private:
   friend class PredictorDatabaseInternal;
 
   LoggedInPredictorTable();
-  virtual ~LoggedInPredictorTable();
+  ~LoggedInPredictorTable() override;
 
   // PredictorTableBase methods.
-  virtual void CreateTableIfNonExistent() override;
-  virtual void LogDatabaseStats() override;
+  void CreateTableIfNonExistent() override;
+  void LogDatabaseStats() override;
 
   DISALLOW_COPY_AND_ASSIGN(LoggedInPredictorTable);
 };
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_LOGGED_IN_PREDICTOR_TABLE_H_