switch maskfilters to sk_sp

tests/PaintTest.cpp

Index: tests/PaintTest.cpp
diff --git a/tests/PaintTest.cpp b/tests/PaintTest.cpp
index b07c0e41ae7d401bed41544988fd189659569910..253ce86769dad008226c5d2b656c77b94ffbf558 100644
--- a/tests/PaintTest.cpp
+++ b/tests/PaintTest.cpp
@@ -147,9 +147,8 @@ DEF_TEST(Paint_copy, reporter) {
     // set a few pointers
     SkLayerDrawLooper::Builder looperBuilder;
     paint.setLooper(looperBuilder.detach());
-    SkMaskFilter* mask = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
-                                      SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)));
-    paint.setMaskFilter(mask)->unref();
+    paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
+                                               SkBlurMask::ConvertRadiusToSigma(1)));
 
     // copy the paint using the copy constructor and check they are the same
     SkPaint copiedPaint = paint;