[heap] Use right BodyDescriptor for JSWeakCollection

src/heap/objects-visiting-inl.h

Index: src/heap/objects-visiting-inl.h
diff --git a/src/heap/objects-visiting-inl.h b/src/heap/objects-visiting-inl.h
index 252b2fe5e2fb7b898bc6e21f86981465764b9930..f3502568d6dde6107133f3e47633a02efdca44e6 100644
--- a/src/heap/objects-visiting-inl.h
+++ b/src/heap/objects-visiting-inl.h
@@ -84,7 +84,10 @@ void StaticNewSpaceVisitor<StaticVisitor>::Initialize() {
 
   table_.Register(kVisitFreeSpace, &VisitFreeSpace);
 
-  table_.Register(kVisitJSWeakCollection, &JSObjectVisitor::Visit);
+  table_.Register(
+      kVisitJSWeakCollection,
+      &FlexibleBodyVisitor<StaticVisitor, JSWeakCollection::BodyDescriptor,
+                           int>::Visit);
 
   table_.Register(kVisitJSRegExp, &JSObjectVisitor::Visit);