Fix regression in setting up SharedWorkerGlobalScope

cf0355d regressed setting up a SharedWorkerGlobalScope by removing the steps that set its constructor url and name. This was noticed in #1782 (comment).

Author: domenic

source

@@ -96700,8 +96700,9 @@ interface <dfn>SharedWorkerGlobalScope</dfn> : <span>WorkerGlobalScope</span> {
   <p>When a user agent is to <dfn data-export="">run a worker</dfn> for a script with
   <code>Worker</code> or <code>SharedWorker</code> object <var>worker</var>, <span>URL</span>
   <var>url</var>, <span>environment settings object</span> <var>outside settings</var>,
-  <code>MessagePort</code> <var>outside port</var>, and a <code>WorkerOptions</code> dictionary
-  <var>options</var>, it must run the following steps:</p>
+  <code>MessagePort</code> <var>outside port</var>, a <code>WorkerOptions</code> dictionary
+  <var>options</var>, and an optional string <var>name</var>, it must run the following steps.
+  (<var>name</var> must always be provided if <var>worker</var> is a <code>SharedWorker</code>.)</p>
 
   <ol>
 
@@ -96748,6 +96749,19 @@ interface <dfn>SharedWorkerGlobalScope</dfn> : <span>WorkerGlobalScope</span> {
    context</var> and <var>outside settings</var>, and let <var>inside settings</var> be the
    result.</p></li>
 
+   <li>
+    <p>If <var>is shared</var> is true, then:</p>
+
+    <ol>
+     <li><p>Set <var>worker global scope</var>'s <span
+     data-x="concept-SharedWorkerGlobalScope-constructor-url">constructor url</span> to
+     <var>url</var>.</p></li>
+
+     <li><p>Set <var>worker global scope</var>'s <span
+     data-x="concept-SharedWorkerGlobalScope-name">name</span> to <var>name</var>.</p></li>
+    </ol>
+   </li>
+
    <li><p>Let <var>destination</var> be "<code data-x="">sharedworker</code>" if <var>is
    shared</var> is true, and "<code data-x="">worker</code>" otherwise.</p></li>
 
@@ -97448,7 +97462,7 @@ interface <dfn>SharedWorker</dfn> : <span>EventTarget</span> {
    parallel</span>.</p></li>
 
    <li><p><span>Run a worker</span> given <var>worker</var>, <var>urlRecord</var>, <var>outside
-   settings</var>, <var>outside port</var>, and <var>options</var>.</p></li>
+   settings</var>, <var>outside port</var>, <var>options</var>, and <var>name</var>.</p></li>
 
   </ol>