replace 'virtual ... OVERRIDE' with '... override'

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..a2989d420f8f5209e2ed72615ec7b3ac7b70c6b9 100644
--- a/base/prefs/pref_member.h
+++ b/base/prefs/pref_member.h
@@ -116,8 +116,8 @@ class BASE_PREFS_EXPORT PrefMemberBase : public PrefObserver {
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
   // PrefObserver
-  virtual void OnPreferenceChanged(PrefService* service,
-                                   const std::string& pref_name) OVERRIDE;
+  void OnPreferenceChanged(PrefService* service,
+                           const std::string& pref_name) override;
 
   void VerifyValuePrefName() const {
     DCHECK(!pref_name_.empty());
@@ -263,8 +263,8 @@ class PrefMember : public subtle::PrefMemberBase {
    protected:
     virtual ~Internal() {}
 
-    virtual BASE_PREFS_EXPORT bool UpdateValueInternal(
-        const base::Value& value) const OVERRIDE;
+    BASE_PREFS_EXPORT bool UpdateValueInternal(
+        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(); }
+  Internal* internal() const override { return internal_.get(); }
+  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);