move most of SkFontHost to private (preceeding making it all private)

trunk/src/core/SkTypefacePriv.h

Index: trunk/src/core/SkTypefacePriv.h
===================================================================
--- trunk/src/core/SkTypefacePriv.h	(revision 0)
+++ trunk/src/core/SkTypefacePriv.h	(revision 0)
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkTypefacePriv_DEFINED
+#define SkTypefacePriv_DEFINED
+
+#include "SkTypeface.h"
+
+/**
+ *  Return a ref'd typeface, which must later be unref'd
+ *
+ *  If the parameter is non-null, it will be ref'd and returned, otherwise
+ *  it will be the default typeface.
+ */
+static inline SkTypeface* ref_or_default(SkTypeface* face) {
+    return face ? SkRef(face) : SkTypeface::RefDefault();
+}
+
+/**
+ *  Always resolves to a non-null typeface, either the value passed to its
+ *  constructor, or the default typeface if null was passed.
+ */
+class SkAutoResolveDefaultTypeface : public SkAutoTUnref<SkTypeface> {
+public:
+    SkAutoResolveDefaultTypeface() : INHERITED(SkTypeface::RefDefault()) {}
+    
+    SkAutoResolveDefaultTypeface(SkTypeface* face)
+        : INHERITED(ref_or_default(face)) {}
+
+private:
+    typedef SkAutoTUnref<SkTypeface> INHERITED;
+};
+
+#endif