savelayer gm

BUG=skia:

Change-Id: Ie24ed6e450b77447a75b5b9bdd0a4516cca5e85c
Reviewed-on: https://skia-review.googlesource.com/7093
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/gn/gm.gni b/gn/gm.gni
index 04ff445..fcdf4a3 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -241,6 +241,7 @@
   "$_gm/rrectclipdrawpaint.cpp",
   "$_gm/rrects.cpp",
   "$_gm/samplerstress.cpp",
+  "$_gm/savelayer.cpp",
   "$_gm/scaledstrokes.cpp",
   "$_gm/shaderbounds.cpp",
   "$_gm/shadertext.cpp",