Make GrConvolutionEffect only support Gaussian kernels and rename.

Change-Id: Ia874ad5bacc550b7ecec579719242e3354dca34b
Reviewed-on: https://skia-review.googlesource.com/7432
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 8629ecd..1a0a5ae 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -302,8 +302,6 @@
   "$_src/gpu/effects/GrCustomXfermode.cpp",
   "$_src/gpu/effects/GrBezierEffect.cpp",
   "$_src/gpu/effects/GrBezierEffect.h",
-  "$_src/gpu/effects/GrConvolutionEffect.cpp",
-  "$_src/gpu/effects/GrConvolutionEffect.h",
   "$_src/gpu/effects/GrConvexPolyEffect.cpp",
   "$_src/gpu/effects/GrConvexPolyEffect.h",
   "$_src/gpu/effects/GrBicubicEffect.cpp",
@@ -318,6 +316,8 @@
   "$_src/gpu/effects/GrDitherEffect.h",
   "$_src/gpu/effects/GrGammaEffect.cpp",
   "$_src/gpu/effects/GrGammaEffect.h",
+  "$_src/gpu/effects/GrGaussianConvolutionFragmentProcessor.cpp",
+  "$_src/gpu/effects/GrGaussianConvolutionFragmentProcessor.h",
   "$_src/gpu/effects/GrMatrixConvolutionEffect.cpp",
   "$_src/gpu/effects/GrMatrixConvolutionEffect.h",
   "$_src/gpu/effects/GrOvalEffect.cpp",