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

chrome/browser/android/preferences/website_preference_bridge.cc

 // Copyright 2015 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/website_preference_bridge.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/bind.h"
@@ skipping 348 matching lines @@
 
     if (info.node_type == CookieTreeNode::DetailedInfo::TYPE_COOKIE &&
         info.cookie &&
         domain_.DomainIs(info.cookie->Domain().c_str()))
       cookies_tree_model_->DeleteCookieNode(node);
   }
 
  private:
   friend class base::RefCountedThreadSafe<SiteDataDeleteHelper>;
 
-  virtual ~SiteDataDeleteHelper() {}
+  ~SiteDataDeleteHelper() override {}
 
   Profile* profile_;
 
   // The domain we want to delete data for.
   GURL domain_;
 
   // Keeps track of when we're ready to close batch processing.
   bool ending_batch_processing_;
 
   scoped_ptr<CookiesTreeModel> cookies_tree_model_;
@@ skipping 221 matching lines @@
   GURL url(ConvertJavaStringToUTF8(env, jorigin));
   scoped_refptr<SiteDataDeleteHelper> site_data_deleter(
       new SiteDataDeleteHelper(profile, url));
   site_data_deleter->Run();
 }
 
 // Register native methods
 bool RegisterWebsitePreferenceBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }