move setshader to sk_sp

gm/perlinnoise.cpp

Index: gm/perlinnoise.cpp
diff --git a/gm/perlinnoise.cpp b/gm/perlinnoise.cpp
index 92f0f963c3ee70bcb4b0efe53b713237cd10974d..b3ece9dcb6a1a998f304740933a1aa7d6835b493 100644
--- a/gm/perlinnoise.cpp
+++ b/gm/perlinnoise.cpp
@@ -37,13 +37,13 @@ protected:
               float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed,
               bool stitchTiles) {
         SkISize tileSize = SkISize::Make(fSize.width() / 2, fSize.height() / 2);
-        SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
-            SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
-                                                   seed, stitchTiles ? &tileSize : nullptr) :
-            SkPerlinNoiseShader::CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
+        sk_sp<SkShader> shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
+            SkPerlinNoiseShader::MakeFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
+                                                  seed, stitchTiles ? &tileSize : nullptr) :
+            SkPerlinNoiseShader::MakeTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
                                                 seed, stitchTiles ? &tileSize : nullptr);
         SkPaint paint;
-        paint.setShader(shader)->unref();
+        paint.setShader(std::move(shader));
         if (stitchTiles) {
             drawRect(canvas, x, y, paint, tileSize);
             x += tileSize.width();
@@ -110,12 +110,12 @@ protected:
     void install(SkPaint* paint, SkPerlinNoiseShader::Type type,
               float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed,
               bool stitchTiles) {
-        SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
-        SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
-                                                seed, stitchTiles ? &fSize : nullptr) :
-        SkPerlinNoiseShader::CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
-                                              seed, stitchTiles ? &fSize : nullptr);
-        paint->setShader(shader)->unref();
+        sk_sp<SkShader> shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
+            SkPerlinNoiseShader::MakeFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
+                                                  seed, stitchTiles ? &fSize : nullptr) :
+            SkPerlinNoiseShader::MakeTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
+                                                seed, stitchTiles ? &fSize : nullptr);
+        paint->setShader(std::move(shader));
     }
 
     virtual void onDraw(SkCanvas* canvas) {