SkTypeface to use SkStreamAsset.

include/ports/SkFontConfigInterface.h

Index: include/ports/SkFontConfigInterface.h
diff --git a/include/ports/SkFontConfigInterface.h b/include/ports/SkFontConfigInterface.h
index 7a77b16e35c7f77952de917062dd782c00a71ab2..8c084a67b6366904db9be5b10a46c95334ca27f1 100644
--- a/include/ports/SkFontConfigInterface.h
+++ b/include/ports/SkFontConfigInterface.h
@@ -90,9 +90,9 @@ public:
     /**
      *  Given a FontRef, open a stream to access its data, or return null
      *  if the FontRef's data is not available. The caller is responsible for
-     *  calling stream->unref() when it is done accessing the data.
+     *  deleting the stream when it is done accessing the data.
      */
-    virtual SkStream* openStream(const FontIdentity&) = 0;
+    virtual SkStreamAsset* openStream(const FontIdentity&) = 0;
 
     /**
      *  Return a singleton instance of a direct subclass that calls into