Remove Dashboard support and supporting files.

Source/WebCore/xml/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 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
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 144 matching lines @@
     XMLHttpRequest(ScriptExecutionContext*, PassRefPtr<SecurityOrigin>);
 
     virtual void refEventTarget() { ref(); }
     virtual void derefEventTarget() { deref(); }
     virtual EventTargetData* eventTargetData();
     virtual EventTargetData* ensureEventTargetData();
 
     Document* document() const;
     SecurityOrigin* securityOrigin() const;
 
-#if ENABLE(DASHBOARD_SUPPORT)
-    bool usesDashboardBackwardCompatibilityMode() const;
-#endif
-
     virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent);
     virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&);
     virtual void didReceiveData(const char* data, int dataLength);
     virtual void didFinishLoading(unsigned long identifier, double finishTime);
     virtual void didFail(const ResourceError&);
     virtual void didFailRedirectCheck();
 
     String responseMIMEType() const;
     bool responseIsXML() const;
 
@@ skipping 66 matching lines @@
 
     // An enum corresponding to the allowed string values for the responseType attribute.
     ResponseTypeCode m_responseTypeCode;
 
     RefPtr<SecurityOrigin> m_securityOrigin;
 };
 
 } // namespace WebCore
 
 #endif // XMLHttpRequest_h