fix typeface leak

gm/mixedtextblobs.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 "Resources.h"
@@ skipping 21 matching lines @@
     canvas->drawTextBlob(blob, 0, 0, paint);
     canvas->restore();
 }
 
 class MixedTextBlobsGM : public GM {
 public:
     MixedTextBlobsGM() { }
 
 protected:
     void onOnceBeforeDraw() override {
-        fEmojiTypeface.reset(sk_tool_utils::emoji_typeface());
+        sk_tool_utils::emoji_typeface(&fEmojiTypeface);
         fEmojiText = sk_tool_utils::emoji_sample_text();
         fReallyBigATypeface.reset(GetResourceAsTypeface("/fonts/ReallyBigA.ttf"));
 
         SkTextBlobBuilder builder;
 
         // make textblob
         // Text so large we draw as paths
         SkPaint paint;
         paint.setTextSize(385);
         const char* text = "O";
@@ skipping 103 matching lines @@
     static const int kWidth = 1250;
     static const int kHeight = 700;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return SkNEW(MixedTextBlobsGM); )
 }