XHR: reset error flag on aborting request that restarts.

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 896 matching lines @@
     //
     // If, window.onload contains open() and send(), m_loader will be set to
     // non 0 value. So, we cannot continue the outer open(). In such case,
     // just abort the outer open() by returning false.
     RefPtr<ThreadableLoader> loader = m_loader.release();
     loader->cancel();
 
     // Save to a local variable since we're going to drop protection.
     bool newLoadStarted = m_loader;
 
+    // If abort() called internalAbort() and a nested open() ended up
+    // clearing the error flag, but didn't send(), make sure the error
+    // flag is still set.
+    if (!newLoadStarted)
+        m_error = true;
+
     if (async == DropProtectionAsync)
         dropProtectionSoon();
     else
         dropProtection();
 
     return !newLoadStarted;
 }
 
 void XMLHttpRequest::clearResponse()
 {
@@ skipping 443 matching lines @@
 {
     return EventTargetNames::XMLHttpRequest;
 }
 
 ExecutionContext* XMLHttpRequest::executionContext() const
 {
     return ActiveDOMObject::executionContext();
 }
 
 } // namespace WebCore