Use sk_sp text blob APIs

src/utils/SkLua.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 "SkLua.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 2058 matching lines @@
     SkRect bounds;
     lua2rect(L, 2, &bounds);
     const SkPaint& paint = *get_obj<SkPaint>(L, 3);
 
     SkTextBox box;
     box.setMode(SkTextBox::kLineBreak_Mode);
     box.setBox(bounds);
     box.setText(text, strlen(text), paint);
 
     SkScalar newBottom;
-    SkAutoTUnref<SkTextBlob> blob(box.snapshotTextBlob(&newBottom));
-    push_ref<SkTextBlob>(L, blob);
+    push_ref<SkTextBlob>(L, box.snapshotTextBlob(&newBottom));
     SkLua(L).pushScalar(newBottom);
     return 2;
 }
 
 static int lsk_newTypeface(lua_State* L) {
     const char* name = nullptr;
     int style = SkTypeface::kNormal;
 
     int count = lua_gettop(L);
     if (count > 0 && lua_isstring(L, 1)) {
@@ skipping 90 matching lines @@
     REG_CLASS(L, SkTextBlob);
     REG_CLASS(L, SkTypeface);
     REG_CLASS(L, SkXfermode);
 }
 
 extern "C" int luaopen_skia(lua_State* L);
 extern "C" int luaopen_skia(lua_State* L) {
     SkLua::Load(L);
     return 0;
 }