Revert "Revert "Revert "Revert "Add GrTextureOp and use to implement SkGpuDevice::drawImage[Rect]() when possible""""

This reverts commit a184ac7e0cdb26919369151f606c194358c94ff5.

Change-Id: I2a4a1b713fd998ba33a5f85a34be1645438a7ac9
Reviewed-on: https://skia-review.googlesource.com/39400
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 3853b4e..602a1f8 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -285,6 +285,8 @@
   "$_src/gpu/ops/GrStencilPathOp.h",
   "$_src/gpu/ops/GrTessellatingPathRenderer.cpp",
   "$_src/gpu/ops/GrTessellatingPathRenderer.h",
+  "$_src/gpu/ops/GrTextureOp.cpp",
+  "$_src/gpu/ops/GrTextureOp.h",
 
   # coverage counting path renderer
   "$_src/gpu/ccpr/GrCCPRAtlas.cpp",