Fix problems with cross-origin redirects.

Source/core/page/EventSource.cpp

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011, Code Aurora Forum. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 113 matching lines @@
     request.setHTTPHeaderField("Cache-Control", "no-cache");
     if (!m_lastEventId.isEmpty())
         request.setHTTPHeaderField("Last-Event-ID", m_lastEventId);
 
     SecurityOrigin* origin = scriptExecutionContext()->securityOrigin();
 
     ThreadableLoaderOptions options;
     options.sendLoadCallbacks = SendCallbacks;
     options.sniffContent = DoNotSniffContent;
     options.allowCredentials = (origin->canRequest(m_url) || m_withCredentials) ? AllowStoredCredentials : DoNotAllowStoredCredentials;
+    options.credentialsRequested = m_withCredentials ? ClientRequestedCredentials : ClientDidNotRequestCredentials;
     options.preflightPolicy = PreventPreflight;
     options.crossOriginRequestPolicy = UseAccessControl;
     options.dataBufferingPolicy = DoNotBufferData;
     options.securityOrigin = origin;
 
     m_loader = ThreadableLoader::create(scriptExecutionContext(), this, request, options);
 
     if (m_loader)
         m_requestInFlight = true;
 }
@@ skipping 279 matching lines @@
 {
     return &m_eventTargetData;
 }
 
 EventTargetData* EventSource::ensureEventTargetData()
 {
     return &m_eventTargetData;
 }
 
 } // namespace WebCore