Make filesystem objects ScriptWrappable.

Source/modules/filesystem/FileWriterSync.cpp

 /*
  * 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 107 matching lines @@
     m_complete = true;
 #endif
 }
 
 FileWriterSync::FileWriterSync()
     : m_error(FileError::OK)
 #ifndef NDEBUG
     , m_complete(true)
 #endif
 {
+    ScriptWrappable::init(this);
 }
 
 void FileWriterSync::prepareForWrite()
 {
     ASSERT(m_complete);
     m_error = FileError::OK;
 #ifndef NDEBUG
     m_complete = false;
 #endif
 }
 
 FileWriterSync::~FileWriterSync()
 {
 }
 
 
 } // namespace WebCore