Redirect HTML resource bytes directly to parser thread (Blink side CL)

Source/core/loader/DocumentLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 762 matching lines @@
 {
     RefPtr<DocumentLoader> protect(this);
     ResourceError error = resourceError.isNull() ? ResourceError::cancelledError(m_request.url()) : resourceError;
 
     if (mainResourceLoader())
         mainResourceLoader()->cancel(error);
 
     mainReceivedError(error);
 }
 
+void DocumentLoader::attachThreadedDataReceiver(blink::WebThreadedDataReceiver* threadedDataReceiver)
+{
+    if (mainResourceLoader())

[abarth-chromium, 2014/03/10 21:52:20]

Should it be an error to call this function without a mainResourceLoader()? 
What does the caller expect to happen in that case?

+        mainResourceLoader()->attachThreadedDataReceiver(threadedDataReceiver);
+}
+
 void DocumentLoader::endWriting(DocumentWriter* writer)
 {
     ASSERT_UNUSED(writer, m_writer == writer);
     m_writer->end();
     m_writer.clear();
 }
 
 PassRefPtr<DocumentWriter> DocumentLoader::createWriterFor(LocalFrame* frame, const Document* ownerDocument, const KURL& url, const AtomicString& mimeType, const AtomicString& encoding, bool userChosen, bool dispatch)
 {
     // Create a new document before clearing the frame, because it may need to
@@ skipping 48 matching lines @@
 void DocumentLoader::replaceDocument(const String& source, Document* ownerDocument)
 {
     m_frame->loader().stopAllLoaders();
     m_writer = createWriterFor(m_frame, ownerDocument, m_frame->document()->url(), mimeType(), m_writer ? m_writer->encoding() : emptyAtom,  m_writer ? m_writer->encodingWasChosenByUser() : false, true);
     if (!source.isNull())
         m_writer->appendReplacingData(source);
     endWriting(m_writer.get());
 }
 
 } // namespace WebCore