Call the view transition page visibility change steps

This allows the CSS view-transitions spec to react to page visibility changes. Specifically, skip the active transition once a page is hidden.

See w3c/csswg-drafts#9543.

source

@@ -4050,6 +4050,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions/#document-rendering-suppression-for-view-transitions">rendering suppression for view transitions</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions/#activate-view-transition">activate view transition</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions/#viewtransition"><code>ViewTransition</code></dfn></li>
+     <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions/#view-transition-page-visibility-change-steps">view transition page visibility change steps</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions-2/#resolve-inbound-cross-document-view-transition">resolving inbound cross-document view-transition</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions-2/#setup-cross-document-view-transition">setting up a cross-document view-transition</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-view-transitions-2/#can-navigation-trigger-a-cross-document-view-transition">can navigation trigger a cross-document view-transition?</dfn>
@@ -78409,6 +78410,9 @@ END:VCARD</pre>
    <li><p>Run the <span>screen orientation change steps</span> with <var>document</var>.
    <ref>SCREENORIENTATION</ref></p></li>
 
+   <li><p>Run the <span>view transition page visibility change steps</span> with
+   <var>document</var>.</p></li>
+
    <li>
     <p>Run any <dfn export>page visibility change steps</dfn> which may be defined in other
     specifications, with <span>visibility state</span> and <var>document</var>.</p>