Standardize usage of virtual/override/final in base/

base/prefs/pref_value_store.h

 // Copyright (c) 2012 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 BASE_PREFS_PREF_VALUE_STORE_H_
 #define BASE_PREFS_PREF_VALUE_STORE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 131 matching lines @@
     PREF_STORE_TYPE_MAX = DEFAULT_STORE
   };
 
   // Keeps a PrefStore reference on behalf of the PrefValueStore and monitors
   // the PrefStore for changes, forwarding notifications to PrefValueStore. This
   // indirection is here for the sake of disambiguating notifications from the
   // individual PrefStores.
   class PrefStoreKeeper : public PrefStore::Observer {
    public:
     PrefStoreKeeper();
-    virtual ~PrefStoreKeeper();
+    ~PrefStoreKeeper() override;
 
     // Takes ownership of |pref_store|.
     void Initialize(PrefValueStore* store,
                     PrefStore* pref_store,
                     PrefStoreType type);
 
     PrefStore* store() { return pref_store_.get(); }
     const PrefStore* store() const { return pref_store_.get(); }
 
    private:
     // PrefStore::Observer implementation.
-    virtual void OnPrefValueChanged(const std::string& key) override;
-    virtual void OnInitializationCompleted(bool succeeded) override;
+    void OnPrefValueChanged(const std::string& key) override;
+    void OnInitializationCompleted(bool succeeded) override;
 
     // PrefValueStore this keeper is part of.
     PrefValueStore* pref_value_store_;
 
     // The PrefStore managed by this keeper.
     scoped_refptr<PrefStore> pref_store_;
 
     // Type of the pref store.
     PrefStoreType type_;
 
@@ skipping 82 matching lines @@
   // A mapping of preference names to their registered types.
   PrefTypeMap pref_types_;
 
   // True if not all of the PrefStores were initialized successfully.
   bool initialization_failed_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefValueStore);
 };
 
 #endif  // BASE_PREFS_PREF_VALUE_STORE_H_