switch xfermodes over to sk_sp

tests/GrGetCoeffBlendKnownComponentsTest.cpp

Index: tests/GrGetCoeffBlendKnownComponentsTest.cpp
diff --git a/tests/GrGetCoeffBlendKnownComponentsTest.cpp b/tests/GrGetCoeffBlendKnownComponentsTest.cpp
index c55b02b960c6c6215c5f4094f22395609f8f1467..38dfb30c56e0cbc9d8f01cd3f89953b695637fe7 100644
--- a/tests/GrGetCoeffBlendKnownComponentsTest.cpp
+++ b/tests/GrGetCoeffBlendKnownComponentsTest.cpp
@@ -31,7 +31,7 @@ DEF_TEST(GrGetCoeffBlendKnownComponents, reporter) {
     SkRandom random;
     for (int i = 0; i < SkXfermode::kLastCoeffMode; ++i) {
         SkXfermode::Mode mode = (SkXfermode::Mode)i;
-        SkAutoTUnref<SkXfermode> xm(SkXfermode::Create(mode));
+        auto xm(SkXfermode::Make(mode));
         SkXfermode::Coeff srcCoeff, dstCoeff;
         SkAssertResult(SkXfermode::ModeAsCoeff(mode, &srcCoeff, &dstCoeff));
         for (int j = 0; j < 1000; ++j) {
@@ -44,7 +44,7 @@ DEF_TEST(GrGetCoeffBlendKnownComponents, reporter) {
                                            src, kRGBA_GrColorComponentFlags,
                                            dst, kRGBA_GrColorComponentFlags,
                                            &outColor, &outFlags);
-            GrColor baselineColor = make_baseline_color(src, dst, xm);
+            GrColor baselineColor = make_baseline_color(src, dst, xm.get());
             if (SkAbs32(GrColorUnpackA(baselineColor) - GrColorUnpackA(outColor)) > 1 ||
                 SkAbs32(GrColorUnpackR(baselineColor) - GrColorUnpackR(outColor)) > 1 ||
                 SkAbs32(GrColorUnpackG(baselineColor) - GrColorUnpackG(outColor)) > 1 ||