replace OVERRIDE and FINAL with override and final in base/

base/prefs/default_pref_store.h

Index: base/prefs/default_pref_store.h
diff --git a/base/prefs/default_pref_store.h b/base/prefs/default_pref_store.h
index 23b909625599b73072f587c5f6eed63803355faf..99398769c7ea9431070d94904c7191bc35def252 100644
--- a/base/prefs/default_pref_store.h
+++ b/base/prefs/default_pref_store.h
@@ -22,10 +22,10 @@ class BASE_PREFS_EXPORT DefaultPrefStore : public PrefStore {
 
   // PrefStore implementation:
   virtual bool GetValue(const std::string& key,
-                        const base::Value** result) const OVERRIDE;
-  virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
-  virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
-  virtual bool HasObservers() const OVERRIDE;
+                        const base::Value** result) const override;
+  virtual void AddObserver(PrefStore::Observer* observer) override;
+  virtual void RemoveObserver(PrefStore::Observer* observer) override;
+  virtual bool HasObservers() const override;
 
   // Sets a |value| for |key|. Should only be called if a value has not been
   // set yet; otherwise call ReplaceDefaultValue().