Move SkTypeface to sk_sp.

src/core/SkTypefacePriv.h

 /*
  * 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();
+static inline sk_sp<SkTypeface> ref_or_default(SkTypeface* face) {
+    return face ? sk_ref_sp(face) : SkTypeface::MakeDefault();
 }
 
 /**
  *  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> {
+class SkAutoResolveDefaultTypeface : public sk_sp<SkTypeface> {
 public:
-    SkAutoResolveDefaultTypeface() : INHERITED(SkTypeface::RefDefault()) {}
+    SkAutoResolveDefaultTypeface() : INHERITED(SkTypeface::MakeDefault()) {}
 
     SkAutoResolveDefaultTypeface(SkTypeface* face)
         : INHERITED(ref_or_default(face)) {}
 
 private:
-    typedef SkAutoTUnref<SkTypeface> INHERITED;
+    typedef sk_sp<SkTypeface> INHERITED;
 };
 
 #endif