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

src/core/SkPaintPriv.cpp

Index: src/core/SkPaintPriv.cpp
diff --git a/src/core/SkPaintPriv.cpp b/src/core/SkPaintPriv.cpp
index 6725cb49befd4c191bda3b817d7a7eb82d0915ce..cbe2558c2a82aecba3943116711c30386e6f8aae 100644
--- a/src/core/SkPaintPriv.cpp
+++ b/src/core/SkPaintPriv.cpp
@@ -41,7 +41,7 @@ bool SkPaintPriv::Overwrites(const SkPaint* paint, ShaderOverrideOpacity overrid
         }
     }
 
-    return SkXfermode::IsOpaque(paint->getXfermode(), opacityType);
+    return SkXfermode::IsOpaque(paint->getBlendMode(), opacityType);
 }
 
 bool SkPaintPriv::Overwrites(const SkBitmap& bitmap, const SkPaint* paint) {