GrTextContext::Options -> GrSDFTOptions

Rename GrTextContext::Options to GrSDFTOptions. Remove GrTextContext.

TBR=reed@google.com

Change-Id: Ic89966cfe630cc6ee757977a6d63ae1da9e39ef0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/296176
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index d2d4f88..789a261 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -465,14 +465,14 @@
   "$_src/gpu/text/GrDistanceFieldAdjustTable.h",
   "$_src/gpu/text/GrSDFMaskFilter.cpp",
   "$_src/gpu/text/GrSDFMaskFilter.h",
+  "$_src/gpu/text/GrSDFTOptions.cpp",
+  "$_src/gpu/text/GrSDFTOptions.h",
   "$_src/gpu/text/GrStrikeCache.cpp",
   "$_src/gpu/text/GrStrikeCache.h",
   "$_src/gpu/text/GrTextBlob.cpp",
   "$_src/gpu/text/GrTextBlob.h",
   "$_src/gpu/text/GrTextBlobCache.cpp",
   "$_src/gpu/text/GrTextBlobCache.h",
-  "$_src/gpu/text/GrTextContext.cpp",
-  "$_src/gpu/text/GrTextContext.h",
   "$_src/gpu/text/GrTextTarget.h",
 
   # GLSL