Issue #5552 - Update whenDefined steps to resolve with the class

source

@@ -66121,11 +66121,11 @@ dictionary <dfn>ElementDefinitionOptions</dfn> {
    <dt><var>window</var> . <code data-x="dom-window-customElements">customElements</code> . <code
    subdfn data-x="dom-CustomElementRegistry-whenDefined">whenDefined</code>(<var>name</var>)</dt>
 
-   <dd>Returns a promise that will be fulfilled when a <span>custom element</span> becomes defined
-   with the given name. (If such a <span>custom element</span> is already defined, the returned
-   promise will be immediately fulfilled.) Returns a promise rejected with a
-   <span>"<code>SyntaxError</code>"</span> <code>DOMException</code> if not given a <span>valid
-   custom element name</span>.</dd>
+   <dd>Returns a promise that will be fulfilled with the <span>custom element</span>'s constructor
+   when a <span>custom element</span> becomes defined with the given name.
+   (If such a <span>custom element</span> is already defined, the returned promise will be immediately
+   fulfilled.) Returns a promise rejected with a <span>"<code>SyntaxError</code>"</span>
+   <code>DOMException</code> if not given a <span>valid custom element name</span>.</dd>
 
    <dt><var>window</var> . <code data-x="dom-window-customElements">customElements</code> . <code
    subdfn data-x="dom-CustomElementRegistry-upgrade">upgrade</code>(<var>root</var>)</dt>
@@ -66340,7 +66340,7 @@ dictionary <dfn>ElementDefinitionOptions</dfn> {
     <ol>
      <li><p>Let <var>promise</var> be the value of that entry.</p></li>
 
-     <li><p>Resolve <var>promise</var> with undefined.</p></li>
+     <li><p>Resolve <var>promise</var> with <var>constructor</var>.</p></li>
 
      <li><p>Delete the entry with key <var>name</var> from this
      <code>CustomElementRegistry</code>'s <span>when-defined promise map</span>.</p></li>
@@ -66370,7 +66370,7 @@ dictionary <dfn>ElementDefinitionOptions</dfn> {
 
    <li><p>If this <code>CustomElementRegistry</code> contains an entry with <span
    data-x="concept-custom-element-definition-name">name</span> <var>name</var>, then return a new
-   promise resolved with the class used to define such entry.</p></li>
+   promise resolved with that entry's <span data-x="concept-custom-element-definition-constructor">constructor</span>.</p></li>
 
    <li><p>Let <var>map</var> be this <code>CustomElementRegistry</code>'s <span>when-defined
    promise map</span>.</p></li>