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).

This also changes the constructor url from a string to a URL record, for
consistency with other URLs stored on objects throughout the spec.

source

@@ -96556,7 +96556,9 @@ interface <dfn>SharedWorkerGlobalScope</dfn> : <span>WorkerGlobalScope</span> {
   data-dfn-for="SharedWorkerGlobalScope"
   data-x="concept-SharedWorkerGlobalScope-constructor-url">constructor url</dfn> and <dfn
   data-dfn-for="SharedWorkerGlobalScope"
-  data-x="concept-SharedWorkerGlobalScope-name">name</dfn>.
+  data-x="concept-SharedWorkerGlobalScope-name">name</dfn>. They are initialized when the
+  <code>SharedWorkerGlobalScope</code> object is created, in the <span>run a worker</span>
+  algorithm.
 
   <p>Shared workers receive message ports through <code
   data-x="event-WorkerGlobalScope-connect">connect</code> events on their <code>SharedWorkerGlobalScope</code> object for each
@@ -96712,8 +96714,9 @@ 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> is always provided when <var>worker</var> is a <code>SharedWorker</code>.)</p>
 
   <ol>
 
@@ -96760,6 +96763,19 @@ 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>
 
@@ -97360,8 +97376,7 @@ interface <dfn>SharedWorker</dfn> : <span>EventTarget</span> {
    and abort these steps.</p></li>
 
    <li>
-    <p>Let <var>urlString</var> be the <span>resulting URL string</span> and <var>urlRecord</var> be
-    the <span>resulting URL record</span>.</p>
+    <p>Otherwise, let <var>urlRecord</var> be the <span>resulting URL record</span>.</p>
 
     <p class="note">Any <span data-x="same origin">same-origin</span> URL will do, including <code
     data-x="blob protocol">blob:</code> URLs.</p>
@@ -97388,12 +97403,12 @@ interface <dfn>SharedWorker</dfn> : <span>EventTarget</span> {
      <li><p>If there exists a <code>SharedWorkerGlobalScope</code> object whose <span
      data-x="dom-WorkerGlobalScope-closing">closing</span> flag is false, whose <span
      data-x="concept-SharedWorkerGlobalScope-name">name</span> is exactly equal to <var>name</var>,
-     whose <span data-x="concept-SharedWorkerGlobalScope-constructor-url">constructor url</span> is
-     equal to <var>urlString</var>, and whose <span>relevant settings object</span>'s
-     <span data-x="concept-settings-object-origin">origin</span> is <span>same origin</span> with
-     <var>outside settings</var>'s <span data-x="concept-settings-object-origin">origin</span>, then
-     set <var>worker global scope</var> to that <code>SharedWorkerGlobalScope</code>
-     object.</p></li>
+     whose <span data-x="concept-SharedWorkerGlobalScope-constructor-url">constructor url</span>
+     <span data-x="concept-url-equals">equals</span> <var>urlRecord</var>, and whose <span>relevant
+     settings object</span>'s <span data-x="concept-settings-object-origin">origin</span> is
+     <span>same origin</span> with <var>outside settings</var>'s <span
+     data-x="concept-settings-object-origin">origin</span>, then set <var>worker global scope</var>
+     to that <code>SharedWorkerGlobalScope</code> object.</p></li>
 
      <li>
       <p>If <var>worker global scope</var> is not null, but the user agent has been
@@ -97454,7 +97469,8 @@ interface <dfn>SharedWorker</dfn> : <span>EventTarget</span> {
      </li>
 
      <li><p>Otherwise, <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>
+     <var>outside settings</var>, <var>outside port</var>, <var>options</var>, and
+     <var>name</var>.</p></li>
     </ol>
    </li>