Use EmbedderHeapTracer instead of object grouping when trace_embedder_heap flag is set

src/heap/scavenger.cc

Index: src/heap/scavenger.cc
diff --git a/src/heap/scavenger.cc b/src/heap/scavenger.cc
index 3f532ead6265f0f07d8530a1696c7f5f35bf5d43..1d785d08d24232388be4d45603d68f9da313c22a 100644
--- a/src/heap/scavenger.cc
+++ b/src/heap/scavenger.cc
@@ -78,6 +78,10 @@ class ScavengingVisitor : public StaticVisitorBase {
     table_.RegisterSpecializations<ObjectEvacuationStrategy<POINTER_OBJECT>,
                                    kVisitJSObject, kVisitJSObjectGeneric>();
 
+    table_
+        .RegisterSpecializations<ObjectEvacuationStrategy<POINTER_OBJECT>,
+                                 kVisitJSApiObject, kVisitJSApiObjectGeneric>();
+
     table_.RegisterSpecializations<ObjectEvacuationStrategy<POINTER_OBJECT>,
                                    kVisitStruct, kVisitStructGeneric>();
   }