converted GrRRectBlurEffect to SkSL

Bug: skia:
Change-Id: Ifd192db07e02d69d445277a361760ce4a452f603
Reviewed-on: https://skia-review.googlesource.com/87441
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 87e3d9b..fb512bf 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -367,6 +367,8 @@
   "$_src/gpu/effects/GrPremulInputFragmentProcessor.h",
   "$_src/gpu/effects/GrRectBlurEffect.cpp",
   "$_src/gpu/effects/GrRectBlurEffect.h",
+  "$_src/gpu/effects/GrRRectBlurEffect.cpp",
+  "$_src/gpu/effects/GrRRectBlurEffect.h",
   "$_src/gpu/effects/GrRRectEffect.cpp",
   "$_src/gpu/effects/GrRRectEffect.h",
   "$_src/gpu/effects/GrShadowGeoProc.cpp",