Mark focus events composed

Tests: web-platform-tests/wpt#9683.

Fixes whatwg#3511.

Author: annevk

source

@@ -73113,12 +73113,13 @@ END:VCARD</pre>
 
   </ol>
 
-  <p>To <dfn>fire a focus event</dfn> named <var>e</var> at an element <var>t</var> and with a given
+  <p>To <dfn>fire a focus event</dfn> named <var>e</var> at an element <var>t</var> with a given
   related target <var>r</var>, <span data-x="concept-event-fire">fire an event</span> named
   <var>e</var> at <var>t</var>, using <code>FocusEvent</code>, with the <code
-  data-x="dom-FocusEvent-relatedTarget">relatedTarget</code> attribute initialized to <var>r</var>
-  and the <code data-x="dom-UIEvent-view">view</code> attribute initialized to <var>t</var>'s
-  <span>node document</span>'s <code>Window</code> object.</p>
+  data-x="dom-FocusEvent-relatedTarget">relatedTarget</code> attribute initialized to <var>r</var>,
+  the <code data-x="dom-UIEvent-view">view</code> attribute initialized to <var>t</var>'s
+  <span>node document</span>'s <code>Window</code> object, and the <span>composed flag</span>
+  set.</p>
 
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