Revert[8] "replace SkXfermode obj with SkBlendMode enum in paints"

gm/texturedomaineffect.cpp

Index: gm/texturedomaineffect.cpp
diff --git a/gm/texturedomaineffect.cpp b/gm/texturedomaineffect.cpp
index 2dd340e4252dac9c86f8169f744d271eb3a6b670..b0d2ecede6fabac054a12c1bbe1eb47e6b4d1a4e 100644
--- a/gm/texturedomaineffect.cpp
+++ b/gm/texturedomaineffect.cpp
@@ -57,14 +57,14 @@ protected:
         SkColor colors2[] = { SK_ColorMAGENTA, SK_ColorLTGRAY, SK_ColorYELLOW };
         paint.setShader(SkGradientShader::MakeSweep(45.f, 55.f, colors2, nullptr,
                                                     SK_ARRAY_COUNT(colors2)));
-        paint.setXfermodeMode(SkXfermode::kDarken_Mode);
+        paint.setBlendMode(SkBlendMode::kDarken);
         canvas.drawOval(SkRect::MakeXYWH(-5.f, -5.f, fBmp.width() + 10.f, fBmp.height() + 10.f),
                         paint);
 
         SkColor colors3[] = { SK_ColorBLUE, SK_ColorLTGRAY, SK_ColorGREEN };
         paint.setShader(SkGradientShader::MakeSweep(25.f, 35.f, colors3, nullptr,
                                                     SK_ARRAY_COUNT(colors3)));
-        paint.setXfermodeMode(SkXfermode::kLighten_Mode);
+        paint.setBlendMode(SkBlendMode::kLighten);
         canvas.drawOval(SkRect::MakeXYWH(-5.f, -5.f, fBmp.width() + 10.f, fBmp.height() + 10.f),
                         paint);
     }