Suppress cancellation notification in XMLHttpRequest::endLoading

third_party/WebKit/Source/core/xmlhttprequest/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 1454 matching lines @@
     m_parsedResponse = true;
 
     endLoading();
 }
 
 void XMLHttpRequest::endLoading()
 {
     InspectorInstrumentation::didFinishXHRLoading(getExecutionContext(), this, this, m_method, m_url);
 
     if (m_loader) {
+        const bool hasError = m_error;
+        // Set |m_error| in order to suppress the cancel notification (see
+        // XMLHttpRequest::didFail).
+        m_error = true;
         m_loader->cancel();
+        m_error = hasError;
         m_loader = nullptr;
     }
 
     changeState(kDone);
 
     if (!getExecutionContext()->isDocument() || !document() || !document()->frame() || !document()->frame()->page())
         return;
 
     if (status() >= 200 && status() < 300) {
         document()->frame()->page()->chromeClient().ajaxSucceeded(document()->frame());
@@ skipping 232 matching lines @@
     visitor->traceWrappers(m_responseDocument);
     visitor->traceWrappers(m_responseArrayBuffer);
 }
 
 std::ostream& operator<<(std::ostream& ostream, const XMLHttpRequest* xhr)
 {
     return ostream << "XMLHttpRequest " << static_cast<const void*>(xhr);
 }
 
 } // namespace blink