[skotty,sksg] Add support for geometry merge

TBR=
Change-Id: Ia5edbfeae61779ead6031f6dd4e33794b3eefdc0
Reviewed-on: https://skia-review.googlesource.com/90382
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
diff --git a/experimental/sksg/geometry/SkSGPath.cpp b/experimental/sksg/geometry/SkSGPath.cpp
index 9b7b042..a04dcf6 100644
--- a/experimental/sksg/geometry/SkSGPath.cpp
+++ b/experimental/sksg/geometry/SkSGPath.cpp
@@ -24,4 +24,8 @@
     return fPath.computeTightBounds();
 }
 
+SkPath Path::onAsPath() const {
+    return fPath;
+}
+
 } // namespace sksg