Use sk_sp text blob APIs

gm/textblobcolortrans.cpp

 /*
  * Copyright 2015 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 30 matching lines @@
 
         // A8
         paint.setTextSize(28);
         text = "The quick brown fox jumps over the lazy dog.";
         paint.setSubpixelText(false);
         paint.setLCDRenderText(false);
         paint.measureText(text, strlen(text), &bounds);
         sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 8);
 
         // build
-        fBlob.reset(builder.build());
+        fBlob = builder.make();
     }
 
     SkString onShortName() override {
         return SkString("textblobcolortrans");
     }
 
     SkISize onISize() override {
         return SkISize::Make(kWidth, kHeight);
     }
 
@@ skipping 18 matching lines @@
              y += SkScalarFloorToInt(bounds.height())) {
             paint.setColor(colors[colorIndex++ % count]);
             canvas->save();
             canvas->translate(0, SkIntToScalar(y));
             canvas->drawTextBlob(fBlob, 0, 0, paint);
             canvas->restore();
         }
     }
 
 private:
-    SkAutoTUnref<const SkTextBlob> fBlob;
+    sk_sp<SkTextBlob> fBlob;
 
     static constexpr int kWidth = 675;
     static constexpr int kHeight = 1600;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new TextBlobColorTrans;)
 }