Implement VisitHandlesInNewSpaceWithClassIds()

src/global-handles.h

Index: src/global-handles.h
diff --git a/src/global-handles.h b/src/global-handles.h
index 482baef3fa4b62a0c05be194a94163967a4e18cb..75dbf85850c8d8452095a609c3c2141e6c2ab918 100644
--- a/src/global-handles.h
+++ b/src/global-handles.h
@@ -179,6 +179,10 @@ 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);