Move SkTypeface to sk_sp.

gm/fontcache.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkGraphics.h"
 #include "SkTypeface.h"
 
 // GM to stress the GPU font cache
 
 static SkScalar draw_string(SkCanvas* canvas, const SkString& text, SkScalar x,
                            SkScalar y, const SkPaint& paint) {
     canvas->drawText(text.c_str(), text.size(), x, y, paint);
     return x + paint.measureText(text.c_str(), text.size());
 }
 
 class FontCacheGM : public skiagm::GM {
 public:
-    FontCacheGM() {
-        fTypefaces[0] = nullptr;
-        fTypefaces[1] = nullptr;
-    }
-
-    virtual ~FontCacheGM() {
-        SkSafeUnref(fTypefaces[0]);
-        SkSafeUnref(fTypefaces[1]);
-    }
+    FontCacheGM() {}
 
 protected:
     SkString onShortName() override {
         return SkString("fontcache");
     }
 
     SkISize onISize() override {
         return SkISize::Make(1280, 640);
     }
 
@@ skipping 27 matching lines @@
         paint.setTypeface(fTypefaces[1]);
         draw_string(canvas, text, x, y, paint);
         y += 100;
         draw_string(canvas, text2, x, y, paint);
         y += 100;
         draw_string(canvas, text3, x, y, paint);
         y += 100;
     }
 
 private:
-    SkTypeface* fTypefaces[2];
+    sk_sp<SkTypeface> fTypefaces[2];
     typedef GM INHERITED;
 };
 
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new FontCacheGM;)