GrTextureProducer cleanup, phase two: Producer, Adjuster, Maker

Previously: GrTextureProducer, GrTextureAdjuster, and GrTextureMaker
were all in GrTextureParamsAdjuster.h. Now they're each in their own
header.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5202

Change-Id: I17fa9057b11511aa4d3e15569ea1c378cfec4c80
Reviewed-on: https://skia-review.googlesource.com/5202
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index caa7fa1..e3b02b8 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -200,10 +200,14 @@
   "$_src/gpu/GrSurfaceProxy.cpp",
   "$_src/gpu/GrSwizzle.h",
   "$_src/gpu/GrTexture.cpp",
+  "$_src/gpu/GrTextureAdjuster.cpp",
+  "$_src/gpu/GrTextureAdjuster.h",
   "$_src/gpu/GrTextureContext.cpp",
-  "$_src/gpu/GrTextureParamsAdjuster.h",
-  "$_src/gpu/GrTextureParamsAdjuster.cpp",
+  "$_src/gpu/GrTextureMaker.cpp",
+  "$_src/gpu/GrTextureMaker.h",
   "$_src/gpu/GrTexturePriv.h",
+  "$_src/gpu/GrTextureProducer.cpp",
+  "$_src/gpu/GrTextureProducer.h",
   "$_src/gpu/GrTextureProvider.cpp",
   "$_src/gpu/GrTextureProxy.cpp",
   "$_src/gpu/GrTextureRenderTargetProxy.cpp",