[XHR] Call internalAbort() before firing events

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 964 matching lines @@
 }
 
 void XMLHttpRequest::handleNetworkError()
 {
     WTF_LOG(Network, "XMLHttpRequest %p handleNetworkError()", this);
 
     // Response is cleared next, save needed progress event data.
     long long expectedLength = m_response.expectedContentLength();
     long long receivedLength = m_receivedLength;
 
+    if (!internalAbort())
+        return;
+
     handleDidFailGeneric();
     handleRequestError(NetworkError, EventTypeNames::error, receivedLength, expectedLength);
-    internalAbort();
 }
 
 void XMLHttpRequest::handleDidCancel()
 {
     WTF_LOG(Network, "XMLHttpRequest %p handleDidCancel()", this);
 
     // Response is cleared next, save needed progress event data.
     long long expectedLength = m_response.expectedContentLength();
     long long receivedLength = m_receivedLength;
 
@@ skipping 418 matching lines @@
 {
     visitor->trace(m_responseBlob);
     visitor->trace(m_responseStream);
     visitor->trace(m_responseDocument);
     visitor->trace(m_progressEventThrottle);
     visitor->trace(m_upload);
     XMLHttpRequestEventTarget::trace(visitor);
 }
 
 } // namespace blink