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

include/gpu/GrPaint.h

Index: include/gpu/GrPaint.h
diff --git a/include/gpu/GrPaint.h b/include/gpu/GrPaint.h
index 6120348792809ee6765579607a7d1f8e05729996..a8af3c2f172dacf1347406316e48457d0793e41e 100644
--- a/include/gpu/GrPaint.h
+++ b/include/gpu/GrPaint.h
@@ -16,9 +16,9 @@
 #include "effects/GrPorterDuffXferProcessor.h"
 #include "GrFragmentProcessor.h"
 
+#include "SkBlendMode.h"
 #include "SkRefCnt.h"
 #include "SkRegion.h"
-#include "SkXfermode.h"
 
 /**
  * The paint describes how color and coverage are computed at each pixel by GrContext draw
@@ -95,6 +95,10 @@ public:
         fXPFactory = std::move(xpFactory);
     }
 
+    void setPorterDuffXPFactory(SkBlendMode mode) {
+        fXPFactory = GrPorterDuffXPFactory::Make((SkXfermode::Mode)mode);
+    }
+
     void setPorterDuffXPFactory(SkXfermode::Mode mode) {
         fXPFactory = GrPorterDuffXPFactory::Make(mode);
     }