Moving fontSelector from StyleResolver 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 145 matching lines @@
         } else if (m_resolver->hasPendingAuthorStyleSheets()) {
             m_resolver->appendPendingAuthorStyleSheets();
         }
         return *m_resolver.get();
     }
 
     bool hasResolver() const { return m_resolver.get(); }
     void clearResolver();
     void clearMasterResolver();
 
-    CSSFontSelector* fontSelector();
+    CSSFontSelector* fontSelector() { return m_fontSelector.get(); }
+    void resetFontSelector();
+
     void didAttach();
     void didDetach();
     bool shouldClearResolver() const;
     StyleResolverChange resolverChanged(RecalcStyleTime, StyleResolverUpdateMode);
     unsigned resolverAccessCount() const;
 
     void collectDocumentActiveStyleSheets(StyleSheetCollectionBase&);
     void markDocumentDirty() { m_dirtyTreeScopes.markDocument(); }
 
 private:
@@ skipping 47 matching lines @@
     bool m_usesFirstLineRules;
     bool m_usesFirstLetterRules;
     bool m_usesRemUnits;
     unsigned m_maxDirectAdjacentSelectors;
 
     bool m_ignorePendingStylesheets;
     bool m_didCalculateResolver;
     unsigned m_lastResolverAccessCount;
     Timer<StyleEngine> m_resolverThrowawayTimer;
     OwnPtr<StyleResolver> m_resolver;
+
+    RefPtr<CSSFontSelector> m_fontSelector;
 };
 
 }
 
 #endif