More (no more) getBlendMode cleanup

Bug: skia:12173
Change-Id: I81ed805c489024860d4e1d0601413a78c04f1010
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/426006
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/effects/SkLayerDrawLooper.cpp b/src/effects/SkLayerDrawLooper.cpp
index 6d43c32..b898c06 100644
--- a/src/effects/SkLayerDrawLooper.cpp
+++ b/src/effects/SkLayerDrawLooper.cpp
@@ -117,7 +117,7 @@
         dst->setColorFilter(src.refColorFilter());
     }
     if (bits & kXfermode_Bit) {
-        dst->setBlendMode(src.getBlendMode());
+        dst->setBlender(src.refBlender());
     }
 
     // we don't override these