Removed refcounting from TextResourceDecoder

Source/core/loader/TextResourceDecoderBuilder.cpp

 /*
  * 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 38 matching lines @@
     , m_encoding(encoding)
     , m_encodingWasChosenByUser(encodingUserChoosen)
 {
 }
 
 TextResourceDecoderBuilder::~TextResourceDecoderBuilder()
 {
 }
 
 
-inline PassRefPtr<TextResourceDecoder> TextResourceDecoderBuilder::createDecoderInstance(Document* document)
+inline PassOwnPtr<TextResourceDecoder> TextResourceDecoderBuilder::createDecoderInstance(Document* document)
 {
     if (Frame* frame = document->frame()) {
         if (Settings* settings = frame->settings())
             return TextResourceDecoder::create(m_mimeType, settings->defaultTextEncodingName(), settings->usesEncodingDetector());
     }
 
     return TextResourceDecoder::create(m_mimeType, String());
 }
 
 inline void TextResourceDecoderBuilder::setupEncoding(TextResourceDecoder* decoder, Document* document)
@@ skipping 15 matching lines @@
     // we may consider relaxing this later after testing.
     if (frame && canReferToParentFrameEncoding(frame, parentFrame)) {
         if (parentFrame->document()->encodingWasDetectedHeuristically())
             decoder->setHintEncoding(parentFrame->document()->encoding());
 
         if (m_encoding.isEmpty())
             decoder->setEncoding(parentFrame->document()->inputEncoding(), TextResourceDecoder::EncodingFromParentFrame);
     }
 }
 
-PassRefPtr<TextResourceDecoder> TextResourceDecoderBuilder::buildFor(Document* document)
+PassOwnPtr<TextResourceDecoder> TextResourceDecoderBuilder::buildFor(Document* document)
 {
-    RefPtr<TextResourceDecoder> decoder = createDecoderInstance(document);
+    OwnPtr<TextResourceDecoder> decoder = createDecoderInstance(document);
     setupEncoding(decoder.get(), document);
     return decoder.release();
 }
 
 void TextResourceDecoderBuilder::clear()
 {
     if (!m_encodingWasChosenByUser)
         m_encoding = String();
 }
 
 }