Remove unused GrGpuResourceRef and GrTGpuResourceRef

Change-Id: I8b4b323549f51e4601ccb6612f65d354e163e93c
Reviewed-on: https://skia-review.googlesource.com/144504
Auto-Submit: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index ca86484..f4877a5 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -101,8 +101,6 @@
   "$_src/gpu/GrGpuCommandBuffer.h",
   "$_src/gpu/GrGpuResourcePriv.h",
   "$_src/gpu/GrGpuResource.cpp",
-  "$_src/gpu/GrGpuResourceRef.cpp",
-  "$_src/gpu/GrGpuResourceRef.h",
   "$_src/gpu/GrImageTextureMaker.cpp",
   "$_src/gpu/GrImageTextureMaker.h",
   "$_src/gpu/GrMemoryPool.cpp",
@@ -126,6 +124,7 @@
   "$_src/gpu/GrPathRendering.h",
   "$_src/gpu/GrPathUtils.cpp",
   "$_src/gpu/GrPathUtils.h",
+  "$_src/gpu/GrPendingIOResource.h",
   "$_src/gpu/GrPendingProgramElement.h",
   "$_src/gpu/GrOnFlushResourceProvider.cpp",
   "$_src/gpu/GrOnFlushResourceProvider.h",