Removed refcounting from TextResourceDecoder

Source/core/fileapi/FileReaderLoader.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 145 matching lines @@
 
 void FileReaderLoader::cleanup()
 {
     m_loader = 0;
 
     // If we get any error, we do not need to keep a buffer around.
     if (m_errorCode) {
         m_rawData.clear();
         m_stringResult = "";
         m_isRawDataConverted = true;
-        m_decoder = 0;
+        m_decoder.clear();
     }
 }
 
 void FileReaderLoader::didReceiveResponse(unsigned long, const ResourceResponse& response)
 {
     if (response.httpStatusCode() != 200) {
         failed(httpStatusCodeToErrorCode(response.httpStatusCode()));
         return;
     }
 
@@ skipping 217 matching lines @@
     m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding)
 {
     if (!encoding.isEmpty())
         m_encoding = WTF::TextEncoding(encoding);
 }
 
 } // namespace WebCore