Fix problems with cross-origin redirects.

Source/core/xml/XMLHttpRequest.cpp

 /*
  *  Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005-2007 Alexey Proskuryakov <ap@webkit.org>
  *  Copyright (C) 2007, 2008 Julien Chaffraix <jchaffraix@webkit.org>
  *  Copyright (C) 2008, 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
@@ skipping 731 matching lines @@
     }
 
     if (m_requestHeaders.size() > 0)
         request.addHTTPHeaderFields(m_requestHeaders);
 
     ThreadableLoaderOptions options;
     options.sendLoadCallbacks = SendCallbacks;
     options.sniffContent = DoNotSniffContent;
     options.preflightPolicy = uploadEvents ? ForcePreflight : ConsiderPreflight;
     options.allowCredentials = (m_sameOriginRequest || m_includeCredentials) ? AllowStoredCredentials : DoNotAllowStoredCredentials;
+    options.credentialsRequested = m_includeCredentials ? ClientRequestedCredentials : ClientDidNotRequestCredentials;
     options.crossOriginRequestPolicy = UseAccessControl;
     options.securityOrigin = securityOrigin();
     options.initiator = cachedResourceRequestInitiators().xmlhttprequest;
 
 #if ENABLE(XHR_TIMEOUT)
     if (m_timeoutMilliseconds)
         request.setTimeoutInterval(m_timeoutMilliseconds / 1000.0);
 #endif
 
     m_exceptionCode = 0;
@@ skipping 523 matching lines @@
     info.addMember(m_responseDocument, "responseDocument");
     info.addMember(m_binaryResponseBuilder, "binaryResponseBuilder");
     info.addMember(m_responseArrayBuffer, "responseArrayBuffer");
     info.addMember(m_lastSendURL, "lastSendURL");
     info.addMember(m_eventTargetData, "eventTargetData");
     info.addMember(m_progressEventThrottle, "progressEventThrottle");
     info.addMember(m_securityOrigin, "securityOrigin");
 }
 
 } // namespace WebCore