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

Source/core/html/HTMLUnknownElement.h

Index: Source/core/html/HTMLUnknownElement.h
diff --git a/Source/core/html/HTMLUnknownElement.h b/Source/core/html/HTMLUnknownElement.h
index 0cf0e67780c47a965c72ae32f363aea922ab9c33..9d400bfb9ee786a2a37f575b5116ce439df77c3f 100644
--- a/Source/core/html/HTMLUnknownElement.h
+++ b/Source/core/html/HTMLUnknownElement.h
@@ -34,7 +34,7 @@
 
 namespace blink {
 
-class HTMLUnknownElement FINAL : public HTMLElement {
+class HTMLUnknownElement final : public HTMLElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLUnknownElement> create(const QualifiedName& tagName, Document& document)
@@ -42,7 +42,7 @@ public:
         return adoptRefWillBeNoop(new HTMLUnknownElement(tagName, document));
     }
 
-    virtual bool isHTMLUnknownElement() const OVERRIDE { return true; }
+    virtual bool isHTMLUnknownElement() const override { return true; }
 
 private:
     HTMLUnknownElement(const QualifiedName& tagName, Document& document)