Cleanup ConsoleMessage interface.

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 109 matching lines @@
     }
 }
 
 void logConsoleError(ExecutionContext* context, const String& message)
 {
     if (!context)
         return;
     // FIXME: It's not good to report the bad usage without indicating what source line it came from.
     // We should pass additional parameters so we can tell the console where the mistake occurred.
     ConsoleMessage* consoleMessage = ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message);
-    consoleMessage->collectCallStack();
     context->addConsoleMessage(consoleMessage);
 }
 
 enum HeaderValueCategoryByRFC7230 {
     HeaderValueInvalid,
     HeaderValueAffectedByNormalization,
     HeaderValueValid,
     HeaderValueCategoryByRFC7230End
 };
 
@@ skipping 1573 matching lines @@
     visitor->trace(m_responseArrayBuffer);
     visitor->trace(m_progressEventThrottle);
     visitor->trace(m_upload);
     visitor->trace(m_blobLoader);
     XMLHttpRequestEventTarget::trace(visitor);
     DocumentParserClient::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink