[graphite] Fix build for DrawPass

Bug: skia:12466
Change-Id: I2ba1f1541c273ba90032c93a92ed3770dc5b0080
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/453756
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>

experimental/graphite/src/DrawPass.cpp

@@ -14,7 +14,7 @@ namespace skgpu {
 
 std::unique_ptr<DrawPass> DrawPass::Make(std::unique_ptr<DrawList> cmds, SurfaceDrawContext* sdc) {
     // TODO: DrawList processing will likely go here and then move the results into the DrawPass
-    return std::make_unique<DrawPass>();
+    return std::unique_ptr<DrawPass>(new DrawPass());
 }
 
 } // namespace skgpu

gn/graphite.gni

@@ -21,6 +21,8 @@ skia_graphite_sources = [
   "$_src/Device.cpp",
   "$_src/Device.h",
   "$_src/DrawList.h",
+  "$_src/DrawPass.cpp",
+  "$_src/DrawPass.h",
   "$_src/Gpu.cpp",
   "$_src/Gpu.h",
   "$_src/Image_Graphite.cpp",