Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/preferences/pref_service_bridge.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/android/preferences/pref_service_bridge.h"
 
 #include <jni.h>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
@@ skipping 266 matching lines @@
 
 // Redirects a BrowsingDataRemover completion callback back into Java.
 class ClearBrowsingDataObserver : public BrowsingDataRemover::Observer {
  public:
   // |obj| is expected to be the object passed into ClearBrowsingData(); e.g. a
   // ChromePreference.
   ClearBrowsingDataObserver(JNIEnv* env, jobject obj)
       : weak_chrome_native_preferences_(env, obj) {
   }
 
-  virtual void OnBrowsingDataRemoverDone() override {
+  void OnBrowsingDataRemoverDone() override {
     // Just as a BrowsingDataRemover deletes itself when done, we delete ourself
     // when done.  No need to remove ourself as an observer given the lifetime
     // of BrowsingDataRemover.
     scoped_ptr<ClearBrowsingDataObserver> auto_delete(this);
 
     JNIEnv* env = AttachCurrentThread();
     if (weak_chrome_native_preferences_.get(env).is_null())
       return;
 
     Java_PrefServiceBridge_browsingDataCleared(
@@ skipping 400 matching lines @@
                                                                jobject obj) {
   return ConvertUTF8ToJavaString(
       env,
       GetPrefService()->GetString(
           prefs::kSupervisedUserSecondCustodianProfileImageURL)).Release();
 }
 
 bool RegisterPrefServiceBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }