Shaper : new unit test

Bug: skia:9050
Change-Id: I4edc6528c4d625f95ce42b1f96fb0c419ce45134
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211831
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Herb Derby <herb@google.com>
diff --git a/gn/tests.gni b/gn/tests.gni
index 1aaf90f..ebed984 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -217,6 +217,7 @@
   "$_tests/ShaderOpacityTest.cpp",
   "$_tests/ShaderTest.cpp",
   "$_tests/ShadowTest.cpp",
+  "$_tests/ShaperTest.cpp",
   "$_tests/SizeTest.cpp",
   "$_tests/SkBase64Test.cpp",
   "$_tests/skbug5221.cpp",