fix typeface leak

tools/sk_tool_utils.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "sk_tool_utils.h"
 #include "sk_tool_utils_flags.h"
 
@@ skipping 14 matching lines @@
     const char* osName = platform_os_name();
     if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu")) {
         return "CBDT";
     }
     if (!strncmp(osName, "Mac", 3)) {
         return "SBIX";
     }
     return "";
 }
 
-SkTypeface* emoji_typeface() {
+void emoji_typeface(SkAutoTUnref<SkTypeface>* tf) {
     if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) {
-        return GetResourceAsTypeface("/fonts/Funkster.ttf");
+        tf->reset(GetResourceAsTypeface("/fonts/Funkster.ttf"));
+        return;
     }
     if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) {
-        return SkTypeface::CreateFromName("Apple Color Emoji", SkTypeface::kNormal);
+        tf->reset(SkTypeface::CreateFromName("Apple Color Emoji", SkTypeface::kNormal));
+        return;
     }
-    return NULL;
+    tf->reset(NULL);
+    return;
 }
 
 const char* emoji_sample_text() {
     if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) {
         return "Hamburgefons";
     } 
     if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) {
         return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85"  // 💰🏡🎅
                "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80"  // 🍪🍕🚀
                "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 🚻💩📷
@@ skipping 106 matching lines @@
     paint.textToGlyphs(text, len, glyphs.begin());
 
     paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
     const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y,
                                                                 NULL);
     memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t));
 }
 
 
 }  // namespace sk_tool_utils