Add unit test to prevent future memory regressions

Bug: b/138674523
Change-Id: Ie4e37763ca68c7fcfa2f78cfa3c85a21bb863f77
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/233558
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/gn/tests.gni b/gn/tests.gni
index bba8287..5815c04 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -213,6 +213,7 @@
   "$_tests/RefCntTest.cpp",
   "$_tests/RegionTest.cpp",
   "$_tests/RenderTargetContextTest.cpp",
+  "$_tests/RepeatedClippedBlurTest.cpp",
   "$_tests/ResourceAllocatorTest.cpp",
   "$_tests/ResourceCacheTest.cpp",
   "$_tests/RoundRectTest.cpp",