more shader-->sp conversions

gm/ovals.cpp

Index: gm/ovals.cpp
diff --git a/gm/ovals.cpp b/gm/ovals.cpp
index e4cc46eb210c714dfc3a96cf6f44957c2725c32a..580426b2442c15a2442b37c90dbe1aa12b8da4a6 100755
--- a/gm/ovals.cpp
+++ b/gm/ovals.cpp
@@ -246,12 +246,8 @@ protected:
         SkPoint center = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
         SkColor colors[] = { SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN };
         SkScalar pos[] = { 0, SK_ScalarHalf, SK_Scalar1 };
-        SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center,
-                                                     SkIntToScalar(20),
-                                                     colors,
-                                                     pos,
-                                                     SK_ARRAY_COUNT(colors),
-                                                     SkShader::kClamp_TileMode));
+        auto shader = SkGradientShader::MakeRadial(center, 20, colors, pos, SK_ARRAY_COUNT(colors),
+                                                   SkShader::kClamp_TileMode);
 
         for (int i = 0; i < fPaints.count(); ++i) {
             canvas->save();