[keys] Postpone shadowed key checking in the KeyAccumulator

src/elements.cc

Index: src/elements.cc
diff --git a/src/elements.cc b/src/elements.cc
index 3cf8378162844a1fc00525e3ccacdb6f47406ac5..f58249b1518a8e49059a7576c48207eac700c6b5 100644
--- a/src/elements.cc
+++ b/src/elements.cc
@@ -1327,7 +1327,7 @@ class DictionaryElementsAccessor
       if (!dictionary->IsKey(isolate, raw_key)) continue;
       uint32_t key = FilterKey(dictionary, i, raw_key, filter);
       if (key == kMaxUInt32) {
-        keys->AddShadowKey(raw_key);
+        keys->AddShadowingKey(raw_key);
         continue;
       }
       elements->set(insertion_index, raw_key);