Add a guard to Notify Controller Change

This change adds a guard to check the type of the given service worker
client, and run the step only for the environment settings object type
clients.

docs/index.bs

@@ -3973,7 +3973,7 @@ spec: rfc7231; urlPrefix: https://tools.ietf.org/html/rfc7231
     </dl>
     <ol>
       <li><a>Assert</a>: <var>client</var> is not null.</li>
-      <li><a>Queue a task</a> to <a>fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client">associated</a> with.</li>
+      <li>If <var>client</var> is a type of <a>environment settings object</a>, <a>queue a task</a> to <a>fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client">associated</a> with.</li>
     </ol>
     <p>The <a>task</a> <em class="rfc2119" title="MUST">must</em> use <var>client</var>'s <a>responsible event loop</a> and the <a>DOM manipulation task source</a>.</p>
   </section>

docs/index.html

@@ -4983,7 +4983,7 @@ <h3 class="heading settled" id="notify-controller-change-algorithm"><span class=
       </dl>
       <ol>
        <li><a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-algorithm-conventions">Assert</a>: <var>client</var> is not null.
-       <li><a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">Queue a task</a> to <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-fire">fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface" id="ref-for-service-worker-container-interface-16">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client" id="ref-for-dfn-service-worker-container-interface-client-9">associated</a> with.
+       <li>If <var>client</var> is a type of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#environment-settings-object">environment settings object</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">queue a task</a> to <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-fire">fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface" id="ref-for-service-worker-container-interface-16">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client" id="ref-for-dfn-service-worker-container-interface-client-9">associated</a> with.
       </ol>
       <p>The <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">task</a> <em class="rfc2119" title="MUST">must</em> use <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#responsible-event-loop">responsible event loop</a> and the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#dom-manipulation-task-source">DOM manipulation task source</a>.</p>
      </section>

docs/v1/index.bs

@@ -3540,7 +3540,7 @@ spec: rfc7231; urlPrefix: https://tools.ietf.org/html/rfc7231
     </dl>
     <ol>
       <li><a>Assert</a>: <var>client</var> is not null.</li>
-      <li><a>Queue a task</a> to <a>fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client">associated</a> with.</li>
+      <li>If <var>client</var> is a type of <a>environment settings object</a>, <a>queue a task</a> to <a>fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client">associated</a> with.</li>
     </ol>
     <p>The <a>task</a> <em class="rfc2119" title="MUST">must</em> use <var>client</var>'s <a>responsible event loop</a> and the <a>DOM manipulation task source</a>.</p>
   </section>

docs/v1/index.html

@@ -4586,7 +4586,7 @@ <h3 class="heading settled" id="notify-controller-change-algorithm"><span class=
       </dl>
       <ol>
        <li><a data-link-type="dfn" href="http://tc39.github.io/ecma262/#sec-algorithm-conventions">Assert</a>: <var>client</var> is not null.
-       <li><a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">Queue a task</a> to <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-fire">fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface" id="ref-for-service-worker-container-interface-16">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client" id="ref-for-dfn-service-worker-container-interface-client-8">associated</a> with.
+       <li>If <var>client</var> is a type of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#environment-settings-object">environment settings object</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task">queue a task</a> to <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-event-fire">fire an event</a> named <code>controllerchange</code> at the <code><a href="#service-worker-container-interface" id="ref-for-service-worker-container-interface-16">ServiceWorkerContainer</a></code> object <var>client</var> is <a href="#dfn-service-worker-container-interface-client" id="ref-for-dfn-service-worker-container-interface-client-8">associated</a> with.
       </ol>
       <p>The <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-task">task</a> <em class="rfc2119" title="MUST">must</em> use <var>client</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#responsible-event-loop">responsible event loop</a> and the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#dom-manipulation-task-source">DOM manipulation task source</a>.</p>
      </section>