Run parts of the revoke() function appropriately in parallel.

Fixes w3c/permissions#143.

index.bs

@@ -26,11 +26,8 @@ partial interface Permissions {
 </xmp>
 
 When the <dfn for='Permissions' method>revoke(|permissionDesc|)</dfn> method is
-invoked, the UA must return <a>a new promise</a> |promise| and run the following
-steps <a>in parallel</a>:
-
-Issue: Rearrange this to avoid converting ECMAScript objects to IDL and calling
-query() in parallel.
+invoked, the UA MUST run the following algorithm, passing the parameter
+|permissionDesc|:
 
 <ol class="algorithm">
 1. Let |rootDesc| be the object |permissionDesc| refers to, [=converted to an
@@ -40,14 +37,19 @@ query() in parallel.
     to an IDL value=] of <code>|rootDesc|.{{PermissionDescriptor/name}}</code>'s
     [=permission descriptor type=]. If this throws an exception, return [=a
     promise rejected with=] that exception and abort these steps.
-1. The UA now has [=new information about the user's intent|new
-    information that the user intends=] to revoke permission to use the
-    feature described by |typedDescriptor|.
-1. If any tasks run due to <a
-    href="https://w3c.github.io/permissions/#reacting-to-revocation">Reacting to
-    users revoking permission</a>, wait for them to finish.
-1. <a>Resolve</a> |promise| with the result of <code><a idl for="Permissions"
-    >query(|permissionDesc|)</a></code>.
+1. Return [=a new promise=] |promise| and run the following steps [=in parallel=]:
+    1. The UA now has [=new information about the user's intent|new
+        information that the user intends=] to revoke permission to use the
+        feature described by |typedDescriptor|.
+    1. If any tasks run due to <a
+        href="https://w3c.github.io/permissions/#reacting-to-revocation">Reacting to
+        users revoking permission</a>, wait for them to finish.
+    1. [=Queue a task=] to [=resolve=] |promise| with the result of
+        <code><a idl
+        for="Permissions">query(|permissionDesc|)</a></code>.
+
+        Issue: This should pass |typedDescriptor| directly into the
+        parallel part of query().
 
 </ol>