[WIP] XMLHttpRequest should parse as it receives chunks.

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 23 matching lines @@
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/text/AtomicStringHash.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 class Blob;
 class DOMFormData;
 class Document;
+class DocumentParser;
 class ExceptionState;
 class ResourceRequest;
 class SecurityOrigin;
 class SharedBuffer;
 class Stream;
 class TextResourceDecoder;
 class ThreadableLoader;
 
 typedef int ExceptionCode;
 
@@ skipping 102 matching lines @@
     // 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;
 
     AtomicString responseMIMEType() const;
     bool responseIsXML() const;
 
+    PassOwnPtr<TextResourceDecoder> createDecoder() const;
+
+    void initResponseDocument();
+    void parseDocumentChunk(const char* data, int dataLength);
+
     bool areMethodAndURLValidForSend();
 
     bool initSend(ExceptionState&);
     void sendBytesData(const void*, size_t, ExceptionState&);
 
     const AtomicString& getRequestHeader(const AtomicString& name) const;
     void setRequestHeaderInternal(const AtomicString& name, const AtomicString& value);
 
     void trackProgress(int dataLength);
     // Changes m_state and dispatches a readyStateChange event if new m_state
@@ skipping 41 matching lines @@
     RefPtr<ThreadableLoader> m_loader;
     State m_state;
 
     ResourceResponse m_response;
     String m_responseEncoding;
 
     OwnPtr<TextResourceDecoder> m_decoder;
 
     ScriptString m_responseText;
     RefPtrWillBeMember<Document> m_responseDocument;
+    RefPtrWillBeMember<DocumentParser> m_documentParser;
 
     RefPtr<SharedBuffer> m_binaryResponseBuilder;
     long long m_downloadedBlobLength;
 
     RefPtr<ArrayBuffer> m_responseArrayBuffer;
 
     // Used for onprogress tracking
     long long m_receivedLength;
 
     unsigned m_lastSendLineNumber;
     String m_lastSendURL;
     // An exception to throw in synchronous mode. It's set when failure
     // notification is received from m_loader and thrown at the end of send() if
     // any.
     ExceptionCode m_exceptionCode;
 
     XMLHttpRequestProgressEventThrottle m_progressEventThrottle;
 
     // An enum corresponding to the allowed string values for the responseType attribute.
     ResponseTypeCode m_responseTypeCode;
     RefPtr<SecurityOrigin> m_securityOrigin;
 
     double m_previousReadyStateChangeFireTime;
 
     bool m_async;
     bool m_includeCredentials;
     // Used to skip m_responseDocument creation if it's done previously. We need
     // this separate flag since m_responseDocument can be 0 for some cases.
-    bool m_createdDocument;
+    bool m_parsedResponse;
     bool m_error;
     bool m_uploadEventsAllowed;
     bool m_uploadComplete;
     bool m_sameOriginRequest;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequest_h