Abort traversal if tracker is no longer ongoing.

Fixes #12176

Author: farre

source

@@ -99934,6 +99934,9 @@ interface <dfn interface>NavigationHistoryEntry</dfn> : <span>EventTarget</span>
      <span>"<code>AbortError</code>"</span> <code>DOMException</code> created in
      <var>navigation</var>'s <span data-x="concept-relevant-realm">relevant realm</span>.</p></li>
 
+    <li><p>If <var>apiMethodTracker</var> is not <var>navigation</var>'s <span>ongoing API method
+    tracker</span>, then abort these steps</p></li>
+
      <li>
       <p>If <var>result</var> is "<code data-x="">initiator-disallowed</code>", then <span>queue a
       global task</span> on the <span>navigation and traversal task source</span> given