Centralize active document checks for <a>, <area>, and <link>

Tests: web-platform-tests/wpt#5758.

source

@@ -13400,19 +13400,10 @@ interface <dfn>HTMLLinkElement</dfn> : <span>HTMLElement</span> {
   <p>User agents could also include other information, such as the type of the resource (as given by
   the <code data-x="attr-link-type">type</code> attribute).</p>
 
+  <!-- c.f. <a> and <area>'s similar sections -->
   <p>The <span>activation behavior</span> of <code>link</code> elements that create <span
-  data-x="hyperlink">hyperlinks</span> is to run the following steps:</p>
-
-  <ol><!-- c.f. <a> and <area>'s similar sections -->
-
-   <li><p>If the <code>link</code> element's <span>node document</span> is not <span>fully
-   active</span>, then abort these steps.</p></li>
-
-   <li><p><span data-x="following hyperlinks">Follow the hyperlink</span> created by the
-   <code>link</code> element.</p></li>
-
-  </ol>
-
+  data-x="hyperlink">hyperlinks</span> is to <span data-x="following hyperlinks">follow the
+  hyperlink</span> created by the <code>link</code> element.</p>
 
 
 
@@ -19182,12 +19173,8 @@ interface <dfn>HTMLAnchorElement</dfn> : <span>HTMLElement</span> {
   <p>The <span>activation behavior</span> of <code>a</code> elements that create <span
   data-x="hyperlink">hyperlinks</span> is to run the following steps:</p>
 
-  <ol><!-- c.f. <area>'s similar section, also <link>'s -->
-
-   <li><p>If the <code>a</code> element's <span>node document</span> is not <span>fully active</span>, then abort these steps.</p></li>
+  <ol><!-- c.f. <link> and <area>'s similar section -->
    <!-- https://software.hixie.ch/utilities/js/live-dom-viewer/?saved=2033 -->
-   <!-- https://www.hixie.ch/tests/adhoc/html/navigation/iframe/002.html -->
-
    <li>
 
     <p>If the user has not indicated a specific <span>browsing context</span> for following the
@@ -22773,6 +22760,8 @@ interface <dfn>HTMLHyperlinkElementUtils</dfn> {
   following steps:</p>
 
   <ol>
+   <li><p>If <var>subject</var>'s <span>node document</span> is not <span>fully active</span>, then
+   return.</p></li>
 
    <li><p>Let <var>replace</var> be false.</p></li>
 
@@ -38254,11 +38243,7 @@ interface <dfn>HTMLAreaElement</dfn> : <span>HTMLElement</span> {
   <p>The <span>activation behavior</span> of <code>area</code> elements is to run the following
   steps:</p>
 
-  <ol><!-- c.f. <a>'s similar section -->
-
-   <li><p>If the <code>area</code> element's <span>node document</span> is not <span>fully active</span>,
-   then abort these steps.</p></li>
-
+  <ol><!-- c.f. <link> and <a>'s similar section -->
    <li>
 
     <p>If the user has not indicated a specific <span>browsing context</span> for following the