fix typeface leak

gm/dftext.cpp

 /*
  * Copyright 2011 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 "Resources.h"
 #include "SkCanvas.h"
 #include "SkStream.h"
 #include "SkSurface.h"
 #include "SkTypeface.h"
 
 class DFTextGM : public skiagm::GM {
 public:
     DFTextGM() {
         this->setBGColor(0xFFFFFFFF);
     }
 
 protected:
     void onOnceBeforeDraw() override {
-        fEmojiTypeface.reset(sk_tool_utils::emoji_typeface());
+        sk_tool_utils::emoji_typeface(&fEmojiTypeface);
         fEmojiText = sk_tool_utils::emoji_sample_text();
     }
 
     SkString onShortName() override {
         SkString name("dftext");
         name.append(sk_tool_utils::platform_os_emoji());
         return name;
     }
 
     SkISize onISize() override {
@@ skipping 188 matching lines @@
     }
 
 private:
     SkAutoTUnref<SkTypeface> fEmojiTypeface;
     const char* fEmojiText;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(DFTextGM); )