Store "plausible languages array" on Navigator.

Author: lutien

source

@@ -125528,6 +125528,12 @@ interface <dfn interface>Navigator</dfn> {
 
   <div w-nodev>
 
+  <div algorithm>
+  <p>Each object that implements <code>NavigatorLanguage</code> has
+  an associated <dfn attribute for="NavigatorLanguage">plausible languages array</dfn>,
+  which is a frozen array of BCP 47 language tags. It is initially empty.</p>
+  </div>
+
   <div algorithm>
   <p>The <dfn attribute for="NavigatorLanguage"><code
   data-x="dom-navigator-language">language</code></dfn> getter steps are:</p>
@@ -125548,17 +125554,24 @@ interface <dfn interface>Navigator</dfn> {
   data-x="dom-navigator-languages">languages</code></dfn> getter steps are:</p>
 
   <ol>
+   <li>Let <var>languages</var> be an empty array.</li>
    <li>Let <var>emulatedLanguage</var> be the <span>WebDriver BiDi emulated language</span> for
    <span>this</span>'s <span>relevant settings object</span></li>
 
-   <li>If <var>emulatedLanguage</var> is not null, then return a <span>frozen array</span> containing
-   <var>emulatedLanguage</var>.</li>
+   <li>If <var>emulatedLanguage</var> is not null, then set <var>languages</var> to
+   <span>frozen array</span> containing <var>emulatedLanguage</var></li>
+
+   <li>Otherwise, set <var>languages</var>to <span>frozen array</span> of
+   valid BCP 47 language tags representing either one or more
+   <span data-x="a plausible language">plausible languages</span>, or the user's preferred
+   languages, ordered by preference with the most preferred language first.
+   <ref>BCP47</ref></li>
+
+   <li>If <var>languages</var> and <span>this</span>'s <var>plausible languages array</var>
+   do not have the same values in the same order, then set
+   <span>this</span>'s <span>plausible languages array</span> to <var>languages</var>.</li>
 
-   <li>Return a <span>frozen array</span> of valid BCP 47 language tags representing either one or
-   more <span data-x="a plausible language">plausible languages</span>, or the user's preferred
-   languages, ordered by preference with the most preferred language first. The same object must be
-   returned until the user agent needs to return different values, or values in a different order,
-   or <var>emulatedLanguage</var> is updated. <ref>BCP47</ref></li>
+   <li>Return <span>this</span>'s <span>plausible languages array</span>.</li>
   </ol>
   </div>