Remove the ENABLE_XSLT compile-time flag.

Source/WebCore/xml/XSLStyleSheet.h

 /*
  * This file is part of the XSL implementation.
  *
  * Copyright (C) 2004, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef XSLStyleSheet_h
 #define XSLStyleSheet_h
 
-#if ENABLE(XSLT)
-
 #include "ProcessingInstruction.h"
 #include "StyleSheet.h"
 #include <libxml/tree.h>
 #include <libxslt/transform.h>
 #include <wtf/PassRefPtr.h>
 
 namespace WebCore {
 
 class CachedResourceLoader;
 class XSLImportRule;
@@ skipping 74 matching lines @@
     bool m_processed;
 
     xmlDocPtr m_stylesheetDoc;
     bool m_stylesheetDocTaken;
 
     XSLStyleSheet* m_parentStyleSheet;
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(XSLT)
-
 #endif // XSLStyleSheet_h