Revert of more shader-->sp conversions

gm/textblobshader.cpp

Index: gm/textblobshader.cpp
diff --git a/gm/textblobshader.cpp b/gm/textblobshader.cpp
index 6a8fa49289996268f4b1af669bdf99ec0ee3736d..30674e1d6877521c3595ffa94fc3775bdc7ff9d3 100644
--- a/gm/textblobshader.cpp
+++ b/gm/textblobshader.cpp
@@ -68,11 +68,11 @@
         }
 
         SkISize sz = this->onISize();
-        fShader = SkGradientShader::MakeRadial(SkPoint::Make(SkIntToScalar(sz.width() / 2),
-                                               SkIntToScalar(sz.height() / 2)),
-                                               sz.width() * .66f, colors, pos,
-                                               SK_ARRAY_COUNT(colors),
-                                               SkShader::kRepeat_TileMode);
+        fShader.reset(SkGradientShader::CreateRadial(SkPoint::Make(SkIntToScalar(sz.width() / 2),
+                                                                   SkIntToScalar(sz.height() / 2)),
+                                                     sz.width() * .66f, colors, pos,
+                                                     SK_ARRAY_COUNT(colors),
+                                                     SkShader::kRepeat_TileMode));
     }
 
     SkString onShortName() override {
@@ -104,7 +104,7 @@
 private:
     SkTDArray<uint16_t>            fGlyphs;
     SkAutoTUnref<const SkTextBlob> fBlob;
-    sk_sp<SkShader>                fShader;
+    SkAutoTUnref<SkShader>         fShader;
 
     typedef skiagm::GM INHERITED;
 };