sk_sp for gpu.

src/gpu/effects/GrGammaEffect.h

Index: src/gpu/effects/GrGammaEffect.h
diff --git a/src/gpu/effects/GrGammaEffect.h b/src/gpu/effects/GrGammaEffect.h
index 2e53b09278613799deea19ef7cf09c10f8d4b775..3f84ac91e0febd3ae0b4481b6539d523f244f36b 100644
--- a/src/gpu/effects/GrGammaEffect.h
+++ b/src/gpu/effects/GrGammaEffect.h
@@ -21,7 +21,7 @@ public:
     /**
     * Creates an effect that applies a gamma curve.
     */
-    static const GrFragmentProcessor* Create(SkScalar gamma);
+    static sk_sp<GrFragmentProcessor> Make(SkScalar gamma);
 
     const char* name() const override { return "Gamma"; }