DevTools: Fix async stacks instrumentation for XHRs.

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 1008 matching lines @@
     m_error = true;
 }
 
 void XMLHttpRequest::dispatchProgressEvent(const AtomicString& type, long long receivedLength, long long expectedLength)
 {
     bool lengthComputable = expectedLength > 0 && receivedLength <= expectedLength;
     unsigned long long loaded = receivedLength >= 0 ? static_cast<unsigned long long>(receivedLength) : 0;
     unsigned long long total = lengthComputable ? static_cast<unsigned long long>(expectedLength) : 0;
 
     m_progressEventThrottle.dispatchProgressEvent(type, lengthComputable, loaded, total);
+
+    if (type == EventTypeNames::loadend)
+        InspectorInstrumentation::didDispatchXHRLoadendEvent(executionContext(), this);
 }
 
 void XMLHttpRequest::dispatchProgressEventFromSnapshot(const AtomicString& type)
 {
     dispatchProgressEvent(type, m_receivedLength, m_response.expectedContentLength());
 }
 
 void XMLHttpRequest::handleNetworkError()
 {
     WTF_LOG(Network, "XMLHttpRequest %p handleNetworkError()", this);
@@ skipping 424 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 WebCore