[oilpan] Move CSSSegmentedFontFace to the managed heap

Source/core/css/CSSFontSelector.h

 /*
  * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 39 matching lines @@
 public:
     static PassRefPtr<CSSFontSelector> create(Document* document)
     {
         return adoptRef(new CSSFontSelector(document));
     }
     virtual ~CSSFontSelector();
     
     virtual unsigned version() const OVERRIDE { return m_version; }
 
     virtual PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString&);
-    CSSSegmentedFontFace* getFontFace(const FontDescription&, const AtomicString& family);
+    Result<CSSSegmentedFontFace> getFontFace(const FontDescription&, const AtomicString& family);
 
     void clearDocument();
 
     void addFontFaceRule(const Handle<StyleRuleFontFace>&);
 
     void fontLoaded();
     virtual void fontCacheInvalidated();
 
     bool isEmpty() const;
 
     virtual void registerForInvalidationCallbacks(FontSelectorClient*);
     virtual void unregisterForInvalidationCallbacks(FontSelectorClient*);
 
     Document* document() const { return m_document; }
 
     void beginLoadingFontSoon(CachedFont*);
 
 private:
     CSSFontSelector(Document*);
 
     void dispatchInvalidationCallbacks();
 
     void beginLoadTimerFired(Timer<CSSFontSelector>*);
 
     Document* m_document;
     HashMap<String, OwnPtr<Vector<RefPtr<CSSFontFace> > >, WTF::FastAllocator, CaseFoldingHash> m_fontFaces;
     HashMap<String, OwnPtr<Vector<RefPtr<CSSFontFace> > >, WTF::FastAllocator, CaseFoldingHash> m_locallyInstalledFontFaces;
-    HashMap<String, OwnPtr<HashMap<unsigned, RefPtr<CSSSegmentedFontFace> > >, WTF::FastAllocator, CaseFoldingHash> m_fonts;
+    // FIXME(oilpan): Implement a weak hashmap on the managed heap.
+    typedef HashMap<unsigned, Persistent<CSSSegmentedFontFace> > SegmentedFontFaceHashMap;
+    HashMap<String, OwnPtr<SegmentedFontFaceHashMap>, WTF::FastAllocator, CaseFoldingHash> m_fonts;
     HashSet<FontSelectorClient*> m_clients;
 
     Vector<CachedResourceHandle<CachedFont> > m_fontsToBeginLoading;
     Timer<CSSFontSelector> m_beginLoadingTimer;
     
     unsigned m_version;
 };
 
 } // namespace WebCore
 
 #endif // CSSFontSelector_h