Use EnumerableOwnPropertyNames in structured serialization

Closes #5374.

source

@@ -2877,7 +2877,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-createbytedatablock">CreateByteDataBlock</dfn> abstract operation</li>
      <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-createdataproperty">CreateDataProperty</dfn> abstract operation</li>
      <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-detacharraybuffer">DetachArrayBuffer</dfn> abstract operation</li>
-     <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-enumerableownproperties">EnumerableOwnProperties</dfn> abstract operation</li>
+     <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-enumerableownpropertynames">EnumerableOwnPropertyNames</dfn> abstract operation</li>
      <li>The <dfn data-x-href="https://tc39.es/ecma262/#sec-finishdynamicimport">FinishDynamicImport</dfn> abstract operation</li>
      <li>The <dfn data-x="js-OrdinaryFunctionCreate" data-x-href="https://tc39.es/ecma262/#sec-ordinaryfunctioncreate">OrdinaryFunctionCreate</dfn> abstract operation</li>
      <li>The <dfn data-x="js-Get" data-x-href="https://tc39.es/ecma262/#sec-get-o-p">Get</dfn> abstract operation</li>
@@ -8210,57 +8210,26 @@ interface <dfn>DOMStringList</dfn> {
      </li>
 
      <li>
-      <p>Otherwise:
+      <p>Otherwise, for each <var>key</var> in !
+      <span>EnumerableOwnPropertyNames</span>(<var>value</var>, <var>key</var>):</p>
 
       <ol>
-       <li><p>Let <var>enumerableKeys</var> be a new empty <span data-x="js-List">List</span>.</p></li>
-
-       <li>
-        <p>For each <var>key</var> in ! <var>value</var>.[[OwnPropertyKeys]]():</p>
-
-        <ol>
-         <li>
-          <p>If <span data-x="js-Type">Type</span>(<var>key</var>) is String, then:</p>
-
-          <ol>
-           <li><p>Let <var>valueDesc</var> be !
-           <var>value</var>.[[GetOwnProperty]](<var>key</var>).</p></li>
-
-           <li><p>If <var>valueDesc</var>.[[Enumerable]] is true, then <span data-x="list
-           append">append</span> <var>key</var> to <var>enumerableKeys</var>.</p></li>
-          </ol>
-         </li>
-        </ol>
-       </li>
-
        <li>
-        <p>For each <var>key</var> in <var>enumerableKeys</var>:</p>
+        <p>If ! <span>HasOwnProperty</span>(<var>value</var>, <var>key</var>) is true, then:</p>
 
         <ol>
-         <li>
-          <p>If ! <span>HasOwnProperty</span>(<var>value</var>, <var>key</var>) is true, then:</p>
-
-          <ol>
-           <li><p>Let <var>inputValue</var> be ? <var>value</var>.[[Get]](<var>key</var>,
-           <var>value</var>).</p></li>
+         <li><p>Let <var>inputValue</var> be ? <var>value</var>.[[Get]](<var>key</var>,
+         <var>value</var>).</p></li>
 
-           <li><p>Let <var>outputValue</var> be ?
-           <span>StructuredSerializeInternal</span>(<var>inputValue</var>, <var>forStorage</var>,
-           <var>memory</var>).</p></li>
+         <li><p>Let <var>outputValue</var> be ?
+         <span>StructuredSerializeInternal</span>(<var>inputValue</var>, <var>forStorage</var>,
+         <var>memory</var>).</p></li>
 
-           <li><p><span data-x="list append">Append</span> { [[Key]]: <var>key</var>, [[Value]]:
-           <var>outputValue</var> } to <var>serialized</var>.[[Properties]].</p></li>
-          </ol>
-         </li>
+         <li><p><span data-x="list append">Append</span> { [[Key]]: <var>key</var>, [[Value]]:
+         <var>outputValue</var> } to <var>serialized</var>.[[Properties]].</p></li>
         </ol>
        </li>
       </ol>
-
-      <p class="note">The key collection performed above is very similar to the JavaScript
-      specification's <span>EnumerableOwnProperties</span> operation, but crucially it uses the
-      deterministic ordering provided by the [[OwnPropertyKeys]] internal method, instead of
-      reordering the keys in an unspecified manner as <span>EnumerableOwnProperties</span> does.
-      <ref spec=JAVASCRIPT></p>
      </li>
     </ol>
    </li>
@@ -120882,6 +120851,7 @@ INSERT INTERFACES HERE
   Agust&iacute;n Fern&aacute;ndez,
   Aharon (Vladimir) Lanin,
   Ajai Tirumali,
+  Ajay Poshak, <!-- ajayposhak on GitHub -->
   Akatsuki Kitamura,
   Alan Plum,
   Alastair Campbell,