Blur gm.

Change-Id: I47294ba47880237541dee8193df55e31b3487f24
Reviewed-on: https://skia-review.googlesource.com/22061
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Herb Derby <herb@google.com>
diff --git a/gn/gm.gni b/gn/gm.gni
index 077b80a..a667b89 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -43,6 +43,7 @@
   "$_gm/blurcircles.cpp",
   "$_gm/blurcircles2.cpp",
   "$_gm/blurignorexform.cpp",
+  "$_gm/blurimagevmask.cpp",
   "$_gm/blurquickreject.cpp",
   "$_gm/blurrect.cpp",
   "$_gm/blurredclippedcircle.cpp",