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

samplecode/SampleLayerMask.cpp

Index: samplecode/SampleLayerMask.cpp
diff --git a/samplecode/SampleLayerMask.cpp b/samplecode/SampleLayerMask.cpp
index 5fce85c4b7d7675181ff41aa101870ea269cc148..f0c6a40dc28c32332fe1604e5537260c6b92debc 100644
--- a/samplecode/SampleLayerMask.cpp
+++ b/samplecode/SampleLayerMask.cpp
@@ -44,13 +44,13 @@ protected:
             bounds.offset(-bounds.fLeft, -bounds.fTop);
             c.drawOval(bounds, paint);
 
-            paint.setXfermodeMode(SkXfermode::kDstIn_Mode);
+            paint.setBlendMode(SkBlendMode::kDstIn);
             canvas->drawBitmap(mask, r.fLeft, r.fTop, &paint);
         } else {
             SkPath p;
             p.addOval(r);
             p.setFillType(SkPath::kInverseWinding_FillType);
-            paint.setXfermodeMode(SkXfermode::kDstOut_Mode);
+            paint.setBlendMode(SkBlendMode::kDstOut);
             canvas->drawPath(p, paint);
         }
     }