[XHR] Accept data on didReceiveData call even if responseType is set to Blob

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 246 matching lines @@
     ResourceResponse m_response;
     String m_finalResponseCharset;
 
     OwnPtr<TextResourceDecoder> m_decoder;
 
     ScriptString m_responseText;
     RefPtrWillBeMember<Document> m_responseDocument;
     RefPtrWillBeMember<DocumentParser> m_responseDocumentParser;
 
     RefPtr<SharedBuffer> m_binaryResponseBuilder;
-    long long m_downloadedBlobLength;
+    long long m_lengthDownloadedToFile;
 
     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;
 
     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_parsedResponse;
     bool m_error;
     bool m_uploadEventsAllowed;
     bool m_uploadComplete;
     bool m_sameOriginRequest;
+    // True iff the ongoing resource loading is using the downloadToFile
+    // option.
+    bool m_downloadingToFile;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequest_h