Use EmbedderHeapTracer instead of object grouping when trace_embedder_heap flag is set

src/heap/incremental-marking.cc

Index: src/heap/incremental-marking.cc
diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc
index 686c6738821437a1621c4f495391632813ae58e3..6d046803b953744a716dc632bd5281cfca0788ff 100644
--- a/src/heap/incremental-marking.cc
+++ b/src/heap/incremental-marking.cc
@@ -729,7 +729,9 @@ void IncrementalMarking::FinalizeIncrementally() {
   // 4) Remove weak cell with live values from the list of weak cells, they
   // do not need processing during GC.
   MarkRoots();
-  MarkObjectGroups();
+  if (!heap_->UsingEmbedderHeapTracer()) {
+    MarkObjectGroups();
+  }
   if (incremental_marking_finalization_rounds_ == 0) {
     // Map retaining is needed for perfromance, not correctness,
     // so we can do it only once at the beginning of the finalization.