Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/filesystem/FileWriterSync.h

 /*
  * Copyright (C) 2010 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 24 matching lines @@
 #include "core/fileapi/FileError.h"
 #include "modules/filesystem/FileWriterBase.h"
 #include "public/platform/WebFileWriterClient.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
 
-class FileWriterSync : public ScriptWrappable, public FileWriterBase, public blink::WebFileWriterClient {
+class FileWriterSync FINAL : public ScriptWrappable, public FileWriterBase, public blink::WebFileWriterClient {
 public:
     static PassRefPtr<FileWriterSync> create()
     {
         return adoptRef(new FileWriterSync());
     }
     virtual ~FileWriterSync();
 
     // FileWriterBase
     void write(Blob*, ExceptionState&);
     void seek(long long position, ExceptionState&);
@@ skipping 10 matching lines @@
 
     FileError::ErrorCode m_error;
 #ifndef NDEBUG
     bool m_complete;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // FileWriter_h