Revert of switch colorfilters to sk_sp

gm/emboss.cpp

Index: gm/emboss.cpp
diff --git a/gm/emboss.cpp b/gm/emboss.cpp
index 5773577389ef7d5c25cc0bd1e63ebe9ea752547b..20d3c918909e1faa12cddd57210703ba1fce6a84 100644
--- a/gm/emboss.cpp
+++ b/gm/emboss.cpp
@@ -49,7 +49,7 @@
 
         // this combination of emboss+colorfilter used to crash -- so we exercise it to
         // confirm that we have a fix.
-        paint.setColorFilter(SkColorFilter::MakeModeFilter(0xFFFF0000, SkXfermode::kSrcATop_Mode));
+        paint.setColorFilter(SkColorFilter::CreateModeFilter(0xFFFF0000, SkXfermode::kSrcATop_Mode))->unref();
         canvas->translate(bm.width() + SkIntToScalar(10), 0);
         canvas->drawBitmap(bm, 10, 10, &paint);
     }