Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/LinkImport.h

 /*
  * Copyright (C) 2013 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 27 matching lines @@
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class Document;
 class HTMLImportChild;
 
 //
 // A LinkResource subclasss used for @rel=import.
 //
-class LinkImport : public LinkResource, public HTMLImportChildClient {
+class LinkImport FINAL : public LinkResource, public HTMLImportChildClient {
     WTF_MAKE_FAST_ALLOCATED;
 public:
 
     static PassOwnPtr<LinkImport> create(HTMLLinkElement* owner);
 
     explicit LinkImport(HTMLLinkElement* owner);
     virtual ~LinkImport();
 
     // LinkResource
     virtual void process() OVERRIDE;
@@ skipping 10 matching lines @@
 
 private:
     void clear();
 
     HTMLImportChild* m_child;
 };
 
 } // namespace WebCore
 
 #endif // LinkImport_h