[WebDriver BiDi] emulate user-agent string

Author: sadym-chromium

source

@@ -4607,6 +4607,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><dfn data-x="navigation-status-complete" data-x-href="https://w3c.github.io/webdriver-bidi/#navigation-status-complete">navigation status complete</dfn></li>
      <li><dfn data-x="navigation-status-url" data-x-href="https://w3c.github.io/webdriver-bidi/#navigation-status-url">navigation status url</dfn></li>
      <li><dfn data-x="navigation-status-suggested-filename" data-x-href="https://w3c.github.io/webdriver-bidi/#navigation-status-suggested-filename">navigation status suggested filename</dfn></li>
+     <li><dfn data-x-href="https://w3c.github.io/webdriver-bidi/#webdriver-bidi-emulated-user-agent">WebDriver BiDi emulated User-Agent</dfn></li>
      <li><dfn data-x-href="https://w3c.github.io/webdriver-bidi/#webdriver-bidi-navigation-aborted">WebDriver BiDi navigation aborted</dfn></li>
      <li><dfn data-x-href="https://w3c.github.io/webdriver-bidi/#webdriver-bidi-navigation-committed">WebDriver BiDi navigation committed</dfn></li>
      <li><dfn data-x-href="https://w3c.github.io/webdriver-bidi/#webdriver-bidi-navigation-failed">WebDriver BiDi navigation failed</dfn></li>
@@ -118312,9 +118313,10 @@ interface <dfn interface>Navigator</dfn> {
   follows:</p>
 
   <ol>
-   <li>Let <var>trail</var> be the substring of <span data-x="default-user-agent-value">default
-   `<code>User-Agent</code>` value</span> that follows the "<code data-x="">Mozilla/</code>"
-   prefix.</li>
+   <li>Let <var>userAgent</var> be <span data-x="dom-navigator-userAgent">userAgent</span>.</li>
+
+   <li>Let <var>trail</var> be the substring of <var>userAgent</var> that follows the "<code
+   data-x="">Mozilla/</code>" prefix.</li>
    <!-- Fetch doesn't actually require the value to start with "Mozilla/5.0 (". -->
 
    <li>
@@ -118368,9 +118370,19 @@ interface <dfn interface>Navigator</dfn> {
 
   <!-- securityPolicy: Mozilla only; always returns "" -->
 
-  <p>The <dfn attribute for="NavigatorID"><code data-x="dom-navigator-userAgent">userAgent</code></dfn>
-  getter steps are to return the <span data-x="default-user-agent-value">default `<code>User-Agent</code>`
-  value</span>.</p>
+  <p>The <dfn attribute for="NavigatorID"><code
+  data-x="dom-navigator-userAgent">userAgent</code></dfn> getter steps are:</p>
+
+  <ol>
+   <li><p>Let <var>emulatedUserAgent</var> be the result of <span>WebDriver BiDi emulated
+   User-Agent</span> with <span>this</span>'s <span>relevant settings object</span>.</p></li>
+
+   <li><p>If <var>emulatedUserAgent</var> is not null, then return
+   <var>emulatedUserAgent</var>.</p></li>
+
+   <li><p>Return <span data-x="default-user-agent-value">default `<code>User-Agent</code>`
+   value</span>.</p></li>
+  </ol>
 
   <p>The <dfn attribute for="NavigatorID"><code data-x="dom-navigator-vendor">vendor</code></dfn>
   getter steps are to return the appropriate string from the following list:</p>