Handle Delete of element with LookupIterator

src/lookup.h

Index: src/lookup.h
diff --git a/src/lookup.h b/src/lookup.h
index ed54a7ef7306c7603f626f7b0c529f624a0590b6..29b7d77b270d26447f8190d651ba1c1704462834 100644
--- a/src/lookup.h
+++ b/src/lookup.h
@@ -59,6 +59,12 @@ class LookupIterator final BASE_EMBEDDED {
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
+#if 0  // TODO(verwaest): Enable once blocking hacks are removed.
+#ifdef DEBUG
+    uint32_t index;  // Assert that the name is not an array index.
+    DCHECK(!name->AsArrayIndex(&index));
+#endif  // DEBUG
+#endif
     Next();
   }
 
@@ -79,6 +85,12 @@ class LookupIterator final BASE_EMBEDDED {
         holder_map_(holder_->map(), isolate_),
         initial_holder_(holder_),
         number_(DescriptorArray::kNotFound) {
+#if 0  // TODO(verwaest): Enable once blocking hacks are removed.
+#ifdef DEBUG
+    uint32_t index;  // Assert that the name is not an array index.
+    DCHECK(!name->AsArrayIndex(&index));
+#endif  // DEBUG
+#endif
     Next();
   }