Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/HTMLImportLoader.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 29 matching lines @@
 class DocumentWriter;
 class HTMLImport;
 class HTMLImportLoaderClient;
 
 //
 // Owning imported Document lifetime. It also implements ResourceClient through HTMLImportResourceOwner
 // to feed fetched bytes to the DocumentWriter of the imported document.
 // HTMLImportLoader is owned by and shared between HTMLImportChild.
 //
 //
-class HTMLImportLoader : public RefCounted<HTMLImportLoader>, public HTMLImportResourceOwner {
+class HTMLImportLoader FINAL : public RefCounted<HTMLImportLoader>, public HTMLImportResourceOwner {
 public:
     enum State {
         StateLoading,
         StateWritten,
         StateError,
         StateReady
     };
 
     static PassRefPtr<HTMLImportLoader> create(HTMLImport*, ResourceFetcher*);
 
@@ skipping 31 matching lines @@
     ResourceFetcher* m_fetcher;
     Vector<HTMLImportLoaderClient*> m_clients;
     State m_state;
     RefPtr<Document> m_importedDocument;
     RefPtr<DocumentWriter> m_writer;
 };
 
 } // namespace WebCore
 
 #endif // HTMLImportLoader_h