Fix virtual/override/final usage in Source/bindings/.

Source/bindings/core/v8/custom/V8CustomXPathNSResolver.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 29 matching lines @@
 
 namespace blink {
 
 // V8CustomXPathNSResolver does not create a persistent handle to the
 // given resolver object. So the lifetime of V8CustomXPathNSResolver
 // must not exceed the lifetime of the passed handle.
 class V8CustomXPathNSResolver final : public XPathNSResolver {
 public:
     static V8CustomXPathNSResolver* create(ScriptState*, v8::Local<v8::Object> resolver);
 
-    virtual AtomicString lookupNamespaceURI(const String& prefix) override;
+    AtomicString lookupNamespaceURI(const String& prefix) override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     V8CustomXPathNSResolver(ScriptState*, v8::Local<v8::Object> resolver);
 
     RefPtr<ScriptState> m_scriptState;
     v8::Local<v8::Object> m_resolver; // Handle to resolver object.
 };
 
 } // namespace blink
 
 #endif // V8CustomXPathNSResolver_h