Store the correct number of samples in GrProgramInfo

Bug: skia:11396
Change-Id: I9480b89635bd7a6bdff8ab4876c8eeafdbc27c8b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/442096
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/ops/GrRegionOp.cpp b/src/gpu/ops/GrRegionOp.cpp
index 9ccacf9..ee63835 100644
--- a/src/gpu/ops/GrRegionOp.cpp
+++ b/src/gpu/ops/GrRegionOp.cpp
@@ -97,7 +97,7 @@
             return;
         }
 
-        fProgramInfo = fHelper.createProgramInfoWithStencil(caps, arena, writeView,
+        fProgramInfo = fHelper.createProgramInfoWithStencil(caps, arena, writeView, usesMSAASurface,
                                                             std::move(appliedClip), dstProxyView,
                                                             gp, GrPrimitiveType::kTriangles,
                                                             renderPassXferBarriers, colorLoadOp);