Add steps to destroy the ineligible document from broadcast channel

source

@@ -108259,8 +108259,6 @@ interface <dfn interface>BroadcastChannel</dfn> : <span>EventTarget</span> {
     match the following criteria:</p>
 
     <ul>
-     <li><p>They are <span>eligible for messaging</span>.</p></li>
-
      <li><p>The result of running <span>obtain a storage key for non-storage purposes</span> with
      their <span>relevant settings object</span> <span data-x="storage key equal">equals</span>
      <var>sourceStorageKey</var>.</p></li>
@@ -108270,6 +108268,18 @@ interface <dfn interface>BroadcastChannel</dfn> : <span>EventTarget</span> {
     </ul>
    </li>
 
+   <li>
+    <p>For each <var>destination</var> in <var>destinations</var>, if <var>destination</var> is
+    not <span>eligible for messaging</span>, perfrom the following steps:</p>
+
+    <ul>
+     <li><p>If <var>destination</var>'s <span>relevant global object</span> <var>o</var> is a
+     <code>Window</code>, <span data-x="destroy a document">destroy</span> <var>o</var>'s
+     <span data-x="concept-document-window">associated <code>Document</code></span>.</p></li>
+     <li><p>Remove <var>destination</var> from <var>destinations</var>.</p></li>
+    </ul>
+   </li>
+
    <li><p>Remove <var>source</var> from <var>destinations</var>.</p></li>
 
    <li><p>Sort <var>destinations</var> such that all <code>BroadcastChannel</code> objects whose