[oilpan] Move CSSFontFace to the managed heap

Source/core/css/CSSFontSelector.h

Index: Source/core/css/CSSFontSelector.h
diff --git a/Source/core/css/CSSFontSelector.h b/Source/core/css/CSSFontSelector.h
index 4288afe8bca4dde4bcd43ecf42f5473b3d9db96e..9fa17c890fce9c82c94d6171c21e705cc8226cef 100644
--- a/Source/core/css/CSSFontSelector.h
+++ b/Source/core/css/CSSFontSelector.h
@@ -83,9 +83,10 @@ private:
     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;
-    // FIXME(oilpan): Implement a weak hashmap on the managed heap.
+    // FIXME(oilpan): Move CSSFontSelector to the managed heap and remove CollectionRoot and Persistent.
+    typedef CollectionRoot<Vector<Member<CSSFontFace> > > CSSFontFaceVectorCollection;
+    HashMap<String, OwnPtr<CSSFontFaceVectorCollection>, WTF::FastAllocator, CaseFoldingHash> m_fontFaces;
+    HashMap<String, OwnPtr<CSSFontFaceVectorCollection>, WTF::FastAllocator, CaseFoldingHash> m_locallyInstalledFontFaces;
     typedef HashMap<unsigned, Persistent<CSSSegmentedFontFace> > SegmentedFontFaceHashMap;
     HashMap<String, OwnPtr<SegmentedFontFaceHashMap>, WTF::FastAllocator, CaseFoldingHash> m_fonts;
     HashSet<FontSelectorClient*> m_clients;