Make XHR use the background HTML parser

Source/core/xml/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 132 matching lines @@
 
     void setLastSendLineNumber(unsigned lineNumber) { m_lastSendLineNumber = lineNumber; }
     void setLastSendURL(const String& url) { m_lastSendURL = url; }
 
     XMLHttpRequestUpload* upload();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(readystatechange);
 
     virtual void trace(Visitor*) OVERRIDE;
 
+    static XMLHttpRequest* findInstancePendingDocumentParse(Document*);
+
+    // This is only to be called from |Document::finishedParsing()|.
+    // When we use the off-thread HTML parser, we don't have a complete document
+    // just after |HTMLDocumentParser::finish()|. This method is used to notify
+    // that the response document is completely built.
+    void didFinishParsingDocument();
+
 private:
     XMLHttpRequest(ExecutionContext*, PassRefPtr<SecurityOrigin>);
 
     Document* document() const;
     SecurityOrigin* securityOrigin() const;
 
     virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
     virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) OVERRIDE;
     virtual void didReceiveData(const char* data, int dataLength) OVERRIDE;
     // When responseType is set to "blob", didDownloadData() is called instead
     // of didReceiveData().
     virtual void didDownloadData(int dataLength) OVERRIDE;
     virtual void didFinishLoading(unsigned long identifier, double finishTime) OVERRIDE;
     virtual void didFail(const ResourceError&) OVERRIDE;
     virtual void didFailRedirectCheck() OVERRIDE;
 
+    void endLoading();
+
     // Returns the MIME type part of m_mimeTypeOverride if present and
     // successfully parsed, or returns one of the "Content-Type" header value
     // of the received response.
     //
     // This method is named after the term "final MIME type" defined in the
     // spec but doesn't convert the result to ASCII lowercase as specified in
     // the spec. Must be lowered later or compared using case insensitive
     // comparison functions if required.
     AtomicString finalResponseMIMEType() const;
     // The same as finalResponseMIMEType() but fallbacks to "text/xml" if
@@ skipping 58 matching lines @@
     // Not converted to ASCII lowercase. Must be lowered later or compared
     // using case insensitive comparison functions if needed.
     AtomicString m_mimeTypeOverride;
     unsigned long m_timeoutMilliseconds;
     RefPtrWillBeMember<Blob> m_responseBlob;
     RefPtrWillBeMember<Stream> m_responseLegacyStream;
     PersistentWillBeMember<ReadableStreamImpl<ReadableStreamChunkTypeTraits<ArrayBuffer> > > m_responseStream;
     PersistentWillBeMember<UnderlyingSource> m_streamSource;
 
     RefPtr<ThreadableLoader> m_loader;
+    unsigned long m_loaderIdentifier;
     State m_state;
 
     ResourceResponse m_response;
     String m_finalResponseCharset;
 
     OwnPtr<TextResourceDecoder> m_decoder;
 
     ScriptString m_responseText;
     RefPtrWillBeMember<Document> m_responseDocument;
     RefPtrWillBeMember<DocumentParser> m_responseDocumentParser;
@@ skipping 26 matching lines @@
     bool m_parsedResponse;
     bool m_error;
     bool m_uploadEventsAllowed;
     bool m_uploadComplete;
     bool m_sameOriginRequest;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequest_h