Add a factory to any GrOp-derived class that lacked one

All GrOp-derived classes are going to have allocate their memory in a GrMemoryPool.

Change-Id: Ifa410b05eecd9b68c39dcc15dd4298d617204c13
Reviewed-on: https://skia-review.googlesource.com/132828
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 110667d..65484c3 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -262,6 +262,7 @@
   "$_src/gpu/ops/GrDashOp.h",
   "$_src/gpu/ops/GrDefaultPathRenderer.cpp",
   "$_src/gpu/ops/GrDefaultPathRenderer.h",
+  "$_src/gpu/ops/GrDebugMarkerOp.cpp",
   "$_src/gpu/ops/GrDebugMarkerOp.h",
   "$_src/gpu/ops/GrDrawAtlasOp.cpp",
   "$_src/gpu/ops/GrDrawAtlasOp.h",