Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/HTMLImportsController.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 30 matching lines @@
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class FetchRequest;
 class ExecutionContext;
 class ResourceFetcher;
 class HTMLImportChild;
 class HTMLImportChildClient;
 
-class HTMLImportsController : public HTMLImportRoot, public DocumentSupplement {
+class HTMLImportsController FINAL : public HTMLImportRoot, public DocumentSupplement {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static void provideTo(Document*);
 
     explicit HTMLImportsController(Document*);
     virtual ~HTMLImportsController();
 
     // HTMLImport
     virtual HTMLImportRoot* root() OVERRIDE;
     virtual Document* document() const OVERRIDE;
@@ skipping 24 matching lines @@
     Timer<HTMLImportsController> m_unblockTimer;
 
     // List of import which has been loaded or being loaded.
     typedef Vector<OwnPtr<HTMLImportChild> > ImportList;
     ImportList m_imports;
 };
 
 } // namespace WebCore
 
 #endif // HTMLImportsController_h