Implement VisitHandlesInNewSpaceWithClassIds()

src/global-handles.h

Index: src/global-handles.h
diff --git a/src/global-handles.h b/src/global-handles.h
index 7808d16a03f6e930829671550c5a7bd56b2c7518..4322123191b7bf7dae363e9bc76eb37a65ab8359 100644
--- a/src/global-handles.h
+++ b/src/global-handles.h
@@ -180,6 +180,10 @@ class GlobalHandles {
   // Iterates over all handles that have embedder-assigned class ID.
   void IterateAllRootsWithClassIds(ObjectVisitor* v);
 
+  // Iterates over all handles in the new space that have embedder-assigned
+  // class ID.
+  void IterateAllRootsInNewSpaceWithClassIds(ObjectVisitor* v);
+
   // Iterates over all weak roots in heap.
   void IterateWeakRoots(ObjectVisitor* v);