Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/html

Source/core/html/HTMLRTElement.h

 // 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.
 
 #ifndef HTMLRTElement_h
 #define HTMLRTElement_h
 
 #include "core/html/HTMLElement.h"
 
 namespace blink {
 
 // <rt> is an HTMLElement in script, but we use a separate interface here
 // so HTMLElement's createRenderer doesn't need to know about it.
-class HTMLRTElement FINAL : public HTMLElement {
+class HTMLRTElement final : public HTMLElement {
 public:
     DECLARE_NODE_FACTORY(HTMLRTElement);
 
 private:
     explicit HTMLRTElement(Document&);
 
-    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
+    virtual RenderObject* createRenderer(RenderStyle*) override;
 };
 
 } // namespace
 
 #endif