Create pre-frozen change records for Object.observe

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 3978e88685156e69ec1660f1ea76d2f8b845b3b9..f05d95b4a159d8979226683998ae621f8aef09fe 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -918,8 +918,8 @@ function DefineArrayProperty(obj, p, desc, should_throw) {
           length_desc.configurable_ !== new_desc.configurable_ ||
           length_desc.enumerable_ !== new_desc.configurable_;
       if (updated || reconfigured) {
-        NotifyChange(reconfigured ? "reconfigured" : "updated",
-            obj, "length", length_desc.value_);
+        %EnqueueChangeRecord(obj, reconfigured ? "reconfigured" : "updated",
+            "length", length_desc.value_);
       }
     }
     return true;