Use sk_sp text blob APIs

gm/textblobshader.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 "gm.h"
 
 #include "SkCanvas.h"
@@ skipping 38 matching lines @@
             run->pos[i] = p.getTextSize() * i * .75f;
         }
 
         run = &builder.allocRunPos(p, glyphCount, nullptr);
         memcpy(run->glyphs, fGlyphs.begin(), glyphCount * sizeof(uint16_t));
         for (int i = 0; i < glyphCount; ++i) {
             run->pos[i * 2] = p.getTextSize() * i * .75f;
             run->pos[i * 2 + 1] = 150 + 5 * sinf((float)i * 8 / glyphCount);
         }
 
-        fBlob.reset(builder.build());
+        fBlob = builder.make();
 
         SkColor  colors[2];
         colors[0] = SK_ColorRED;
         colors[1] = SK_ColorGREEN;
 
         SkScalar pos[SK_ARRAY_COUNT(colors)];
         for (unsigned i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
             pos[i] = (float)i / (SK_ARRAY_COUNT(pos) - 1);
         }
 
@@ skipping 25 matching lines @@
             for (int j = 0; j < kYCount; ++j) {
                 canvas->drawTextBlob(fBlob,
                                      SkIntToScalar(i * sz.width() / kXCount),
                                      SkIntToScalar(j * sz.height() / kYCount),
                                      p);
             }
         }
     }
 
 private:
-    SkTDArray<uint16_t>            fGlyphs;
-    SkAutoTUnref<const SkTextBlob> fBlob;
-    sk_sp<SkShader>                fShader;
+    SkTDArray<uint16_t> fGlyphs;
+    sk_sp<SkTextBlob>   fBlob;
+    sk_sp<SkShader>     fShader;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM(return new TextBlobShaderGM("Blobber");)