Adding ASSERT for RuntimeEnabled feature XSLT

Source/core/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
 
-#include <libxml/tree.h>
-#include <libxslt/transform.h>
+#include "RuntimeEnabledFeatures.h"
 #include "core/css/StyleSheet.h"
 #include "core/dom/ProcessingInstruction.h"
 #include "wtf/PassRefPtr.h"
 
+#include <libxml/tree.h>
+#include <libxslt/transform.h>
+
 namespace WebCore {
 
 class ResourceFetcher;
 class XSLImportRule;
 
 class XSLStyleSheet : public StyleSheet {
 public:
     static PassRefPtr<XSLStyleSheet> create(XSLImportRule* parentImport, const String& originalURL, const KURL& finalURL)
     {
+        ASSERT(RuntimeEnabledFeatures::xsltEnabled());
         return adoptRef(new XSLStyleSheet(parentImport, originalURL, finalURL));
     }
     static PassRefPtr<XSLStyleSheet> create(ProcessingInstruction* parentNode, const String& originalURL, const KURL& finalURL)
     {
+        ASSERT(RuntimeEnabledFeatures::xsltEnabled());
         return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     }
     static PassRefPtr<XSLStyleSheet> createEmbedded(ProcessingInstruction* parentNode, const KURL& finalURL)
     {
+        ASSERT(RuntimeEnabledFeatures::xsltEnabled());
         return adoptRef(new XSLStyleSheet(parentNode, finalURL.string(), finalURL, true));
     }
 
     // Taking an arbitrary node is unsafe, because owner node pointer can become stale.
     // XSLTProcessor ensures that the stylesheet doesn't outlive its parent, in part by not exposing it to JavaScript.
     static PassRefPtr<XSLStyleSheet> createForXSLTProcessor(Node* parentNode, const String& originalURL, const KURL& finalURL)
     {
+        ASSERT(RuntimeEnabledFeatures::xsltEnabled());
         return adoptRef(new XSLStyleSheet(parentNode, originalURL, finalURL, false));
     }
 
     virtual ~XSLStyleSheet();
 
     bool parseString(const String&);
 
     void checkLoaded();
 
     const KURL& finalURL() const { return m_finalURL; }
@@ skipping 44 matching lines @@
     xmlDocPtr m_stylesheetDoc;
     bool m_stylesheetDocTaken;
     bool m_compilationFailed;
 
     XSLStyleSheet* m_parentStyleSheet;
 };
 
 } // namespace WebCore
 
 #endif // XSLStyleSheet_h