Always Reconstruct when stylesheets change.

sky/engine/core/dom/TreeScopeStyleSheetCollection.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 52 matching lines @@
 
     Document& document() const { return treeScope().document(); }
     TreeScope& treeScope() const { return *m_treeScope; }
 
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
         Additive
     };
 
-    class StyleSheetChange {
-        STACK_ALLOCATED();
-    public:
-        StyleResolverUpdateType styleResolverUpdateType;
-        bool requiresFullStyleRecalc;
-        Vector<RawPtr<const StyleRuleFontFace> > fontFaceRulesToRemove;
-
-        StyleSheetChange()
-            : styleResolverUpdateType(Reconstruct)
-            , requiresFullStyleRecalc(true) { }
-    };
-
-    void analyzeStyleSheetChange(StyleResolverUpdateMode, const StyleSheetCollection&, StyleSheetChange&);
     void updateUsesRemUnits();
 
-private:
-    static StyleResolverUpdateType compareStyleSheets(const Vector<RefPtr<CSSStyleSheet> >& oldStyleSheets, const Vector<RefPtr<CSSStyleSheet> >& newStylesheets, Vector<RawPtr<StyleSheetContents> >& addedSheets);
-
 protected:
     RawPtr<TreeScope> m_treeScope;
     bool m_usesRemUnits;
 
     DocumentOrderedList m_styleSheetCandidateNodes;
 };
 
 }
 
 #endif  // SKY_ENGINE_CORE_DOM_TREESCOPESTYLESHEETCOLLECTION_H_