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

Source/core/xml/XPathVariableReference.h

Index: Source/core/xml/XPathVariableReference.h
diff --git a/Source/core/xml/XPathVariableReference.h b/Source/core/xml/XPathVariableReference.h
index b3e64e33b6e26e8cfe0d49000c4a03cc52cf15b8..bae90cc0bc29ee0c4c33ac51abd7ef1baa0f4432 100644
--- a/Source/core/xml/XPathVariableReference.h
+++ b/Source/core/xml/XPathVariableReference.h
@@ -33,13 +33,13 @@ namespace blink {
 namespace XPath {
 
 // Variable references are not used with XPathEvaluator.
-class VariableReference FINAL : public Expression {
+class VariableReference final : public Expression {
 public:
     explicit VariableReference(const String& name);
 
 private:
-    virtual Value evaluate(EvaluationContext&) const OVERRIDE;
-    virtual Value::Type resultType() const OVERRIDE { ASSERT_NOT_REACHED(); return Value::NumberValue; }
+    virtual Value evaluate(EvaluationContext&) const override;
+    virtual Value::Type resultType() const override { ASSERT_NOT_REACHED(); return Value::NumberValue; }
 
     String m_name;
 };