XMLHttpRequest: Factor out decorder/document init

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 145 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();
     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 69 matching lines @@
     // 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