hide virtual and rename to onMakeComposed

Bug: skia:
Change-Id: Ic18ee2af3273f81ebec9c9031162e808186c0acd
Reviewed-on: https://skia-review.googlesource.com/108300
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 2667f8f..5795c0a 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -400,7 +400,7 @@
 
     // The paint has both a colorfilter(paintCF) and an imagefilter-which-is-a-colorfilter(imgCF)
     // and we need to combine them into a single colorfilter.
-    return SkColorFilter::MakeComposeFilter(std::move(imgCF), sk_ref_sp(paintCF));
+    return imgCF->makeComposed(sk_ref_sp(paintCF));
 }
 
 /**