Remove the ENABLE_XSLT compile-time flag.

Source/WebCore/dom/DocumentStyleSheetCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 259 matching lines @@
     StyleSheetCandidateListHashSet::iterator begin = m_styleSheetCandidateNodes.begin();
     StyleSheetCandidateListHashSet::iterator end = m_styleSheetCandidateNodes.end();
     for (StyleSheetCandidateListHashSet::iterator it = begin; it != end; ++it) {
         Node* n = *it;
         StyleSheet* sheet = 0;
         if (n->nodeType() == Node::PROCESSING_INSTRUCTION_NODE) {
             // Processing instruction (XML documents only).
             // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion.
             ProcessingInstruction* pi = static_cast<ProcessingInstruction*>(n);
             sheet = pi->sheet();
-#if ENABLE(XSLT)
             // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806>
             if (pi->isXSL() && !m_document->transformSourceDocument()) {
                 // Don't apply XSL transforms until loading is finished.
                 if (!m_document->parsing())
                     m_document->applyXSLTransform(pi);
                 return;
             }
-#endif
         } else if ((n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag)))
 #if ENABLE(SVG)
                    ||  (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
 #endif
                    ) {
             Element* e = toElement(n);
             AtomicString title = e->getAttribute(titleAttr);
             bool enabledViaScript = false;
             if (e->hasLocalName(linkTag)) {
                 // <LINK> element
@@ skipping 201 matching lines @@
     info.addMember(m_authorStyleSheets, "authorStyleSheets");
     info.addMember(m_activeAuthorStyleSheets, "activeAuthorStyleSheets");
     info.addMember(m_styleSheetsForStyleSheetList, "styleSheetsForStyleSheetList");
     info.addMember(m_styleSheetCandidateNodes, "styleSheetCandidateNodes");
     info.addMember(m_preferredStylesheetSetName, "preferredStylesheetSetName");
     info.addMember(m_selectedStylesheetSetName, "selectedStylesheetSetName");
     info.addMember(m_document, "document");
 }
 
 }