Added addXSLStyleSheet and removeXSLStyleSheet to StyleEngine.

Source/core/dom/StyleEngine.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 90 matching lines @@
     const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& injectedAuthorStyleSheets() const;
 
     const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> > activeStyleSheetsForInspector() const;
 
     void modifiedStyleSheet(StyleSheet*);
     void addStyleSheetCandidateNode(Node*, bool createdByParser);
     void removeStyleSheetCandidateNode(Node*);
     void removeStyleSheetCandidateNode(Node*, ContainerNode* scopingNode, TreeScope&);
     void modifiedStyleSheetCandidateNode(Node*);
     void enableExitTransitionStylesheets();
+    void addXSLStyleSheet(ProcessingInstruction*, bool createdByParser);
+    void removeXSLStyleSheet(ProcessingInstruction*);
 
     void invalidateInjectedStyleSheetCache();
     void updateInjectedStyleSheetCache() const;
 
     void addAuthorSheet(PassRefPtrWillBeRawPtr<StyleSheetContents> authorSheet);
 
     void clearMediaQueryRuleSetStyleSheets();
     void updateStyleSheetsInImport(DocumentStyleSheetCollector& parentCollector);
     bool updateActiveStyleSheets(StyleResolverUpdateMode);
 
@@ skipping 67 matching lines @@
     void removeSheet(StyleSheetContents*);
 
     void trace(Visitor*);
 
 private:
     StyleEngine(Document&);
 
     TreeScopeStyleSheetCollection* ensureStyleSheetCollectionFor(TreeScope&);
     TreeScopeStyleSheetCollection* styleSheetCollectionFor(TreeScope&);
     bool shouldUpdateShadowTreeStyleSheetCollection(StyleResolverUpdateMode);
+    bool shouldApplyXSLTransform() const;
 
     void markTreeScopeDirty(TreeScope&);
 
     bool isMaster() const { return m_isMaster; }
     Document* master();
     Document& document() const { return *m_document; }
 
     typedef ListHashSet<TreeScope*, 16> TreeScopeSet;
     static void insertTreeScopeInDocumentOrder(TreeScopeSet&, TreeScope*);
     void clearMediaQueryRuleSetOnTreeScopeStyleSheets(TreeScopeSet treeScopes);
@@ skipping 58 matching lines @@
     unsigned m_maxDirectAdjacentSelectors;
 
     bool m_ignorePendingStylesheets;
     bool m_didCalculateResolver;
     OwnPtrWillBeMember<StyleResolver> m_resolver;
 
     RefPtrWillBeMember<CSSFontSelector> m_fontSelector;
 
     WillBeHeapHashMap<AtomicString, RawPtrWillBeMember<StyleSheetContents> > m_textToSheetCache;
     WillBeHeapHashMap<RawPtrWillBeMember<StyleSheetContents>, AtomicString> m_sheetToTextCache;
+
+    RefPtr<ProcessingInstruction> m_xslStyleSheet;
 };
 
 }
 
 #endif