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

chrome/browser/search_engines/template_url_service_android.h

 // Copyright (c) 2013 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 CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_
 
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 38 matching lines @@
   base::android::ScopedJavaLocalRef<jstring> GetUrlForContextualSearchQuery(
       JNIEnv* env,
       jobject obj,
       jstring jquery,
       jstring jalternate_term,
       jboolean jshould_prefetch);
 
   static bool Register(JNIEnv* env);
 
  private:
-  ~TemplateUrlServiceAndroid();
+  ~TemplateUrlServiceAndroid() override;
 
   bool IsPrepopulatedTemplate(TemplateURL* url);
 
   void OnTemplateURLServiceLoaded();
 
   // TemplateUrlServiceObserver:
   void OnTemplateURLServiceChanged() override;
 
   JavaObjectWeakGlobalRef weak_java_obj_;
 
   // Pointer to the TemplateUrlService for the main profile.
   TemplateURLService* template_url_service_;
 
   scoped_ptr<TemplateURLService::Subscription> template_url_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateUrlServiceAndroid);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_