replace OVERRIDE and FINAL with override and final in base/

base/prefs/pref_member.h

Index: base/prefs/pref_member.h
diff --git a/base/prefs/pref_member.h b/base/prefs/pref_member.h
index 2c3445dcb27388a9014685499b158e71b9229a83..fc277930a5f9be686fe62a5a4f6c7a0fba8d7c6c 100644
--- a/base/prefs/pref_member.h
+++ b/base/prefs/pref_member.h
@@ -117,7 +117,7 @@ class BASE_PREFS_EXPORT PrefMemberBase : public PrefObserver {
 
   // PrefObserver
   virtual void OnPreferenceChanged(PrefService* service,
-                                   const std::string& pref_name) OVERRIDE;
+                                   const std::string& pref_name) override;
 
   void VerifyValuePrefName() const {
     DCHECK(!pref_name_.empty());
@@ -264,7 +264,7 @@ class PrefMember : public subtle::PrefMemberBase {
     virtual ~Internal() {}
 
     virtual BASE_PREFS_EXPORT bool UpdateValueInternal(
-        const base::Value& value) const OVERRIDE;
+        const base::Value& value) const override;
 
     // We cache the value of the pref so we don't have to keep walking the pref
     // tree.
@@ -273,8 +273,8 @@ class PrefMember : public subtle::PrefMemberBase {
     DISALLOW_COPY_AND_ASSIGN(Internal);
   };
 
-  virtual Internal* internal() const OVERRIDE { return internal_.get(); }
-  virtual void CreateInternal() const OVERRIDE { internal_ = new Internal(); }
+  virtual Internal* internal() const override { return internal_.get(); }
+  virtual void CreateInternal() const override { internal_ = new Internal(); }
 
   // This method is used to do the actual sync with pref of the specified type.
   void BASE_PREFS_EXPORT UpdatePref(const ValueType& value);