Use sk_sp text blob APIs

gm/textblobuseaftergpufree.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 29 matching lines @@
 
         SkPaint paint;
         sk_tool_utils::set_portable_typeface(&paint);
         paint.setAntiAlias(true);
         paint.setTextSize(20);
 
         SkTextBlobBuilder builder;
 
         sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10);
 
-        SkAutoTUnref<const SkTextBlob> blob(builder.build());
+        sk_sp<SkTextBlob> blob(builder.make());
 
         // draw textblob
         SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f);
         SkPaint rectPaint;
         rectPaint.setColor(0xffffffff);
         canvas->drawRect(rect, rectPaint);
-        canvas->drawTextBlob(blob.get(), 10, 50, paint);
+        canvas->drawTextBlob(blob, 10, 50, paint);
 
         // This text should look fine
         canvas->getGrContext()->freeGpuResources();
-        canvas->drawTextBlob(blob.get(), 10, 150, paint);
+        canvas->drawTextBlob(blob, 10, 150, paint);
     }
 
 private:
     static constexpr int kWidth = 200;
     static constexpr int kHeight = 200;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new TextBlobUseAfterGpuFree;)
 }
 #endif