Add allow-presentation to sandbox flags

Fixes w3c/presentation-api#299.

Author: mounirlamouri

source

@@ -27990,7 +27990,8 @@ href="?audio">audio&lt;/a> test instead.)&lt;/p></pre>
   data-x="attr-iframe-sandbox-allow-pointer-lock">allow-pointer-lock</code>, <code
   data-x="attr-iframe-sandbox-allow-popups">allow-popups</code>, <code
   data-x="attr-iframe-sandbox-allow-popups-to-escape-sandbox">allow-popups-to-escape-sandbox</code>,
-  <code data-x="attr-iframe-sandbox-allow-same-origin">allow-same-origin</code>, <code
+  <code data-x="attr-iframe-sandbox-allow-presentation">allow-presentation</code>, <code
+  data-x="attr-iframe-sandbox-allow-same-origin">allow-same-origin</code>, <code
   data-x="attr-iframe-sandbox-allow-scripts">allow-scripts</code>, and <code
   data-x="attr-iframe-sandbox-allow-top-navigation">allow-top-navigation</code>.</p>
 
@@ -28006,11 +28007,13 @@ href="?audio">audio&lt;/a> test instead.)&lt;/p></pre>
   data-x="attr-iframe-sandbox-allow-orientation-lock">allow-orientation-lock</code>, <code
   data-x="attr-iframe-sandbox-allow-pointer-lock">allow-pointer-lock</code>, <code
   data-x="attr-iframe-sandbox-allow-popups">allow-popups</code>, <code
+  data-x="attr-iframe-sandbox-allow-presentation">allow-presentation</code>, <code
   data-x="attr-iframe-sandbox-allow-scripts">allow-scripts</code>, and <code
   data-x="attr-iframe-sandbox-allow-popups-to-escape-sandbox">allow-popups-to-escape-sandbox</code>
   keywords re-enable forms, modal dialogs, screen orientation lock, the pointer lock API, popups,
-  scripts, and the creation of unsandboxed <span>auxiliary browsing contexts</span> respectively.
-  <ref spec=POINTERLOCK> <ref spec=SCREENORIENTATION></p>
+  the presentation API, scripts, and the creation of unsandboxed <span>auxiliary browsing
+  contexts</span> respectively. <ref spec=POINTERLOCK> <ref spec=SCREENORIENTATION> <ref
+  spec=PRESENTATION></p>
 
   <p class="warning">Setting both the <code
   data-x="attr-iframe-sandbox-allow-scripts">allow-scripts</code> and <code
@@ -79543,7 +79546,15 @@ callback <dfn>FrameRequestCallback</dfn> = void (<span>DOMHighResTimeStamp</span
 
    </dd>
 
-  </dl>
+   <dt>The <dfn>sandboxed presentation browsing context flag</dfn></dt>
+
+   <dd>
+
+    <p>This flag disables the Presentation API. <ref spec=PRESENTATION></p>
+
+   </dd>
+
+ </dl>
 
   <p>When the user agent is to <dfn>parse a sandboxing directive</dfn>, given a string <var>input</var>, a <span>sandboxing flag set</span> <var>output</var>, and
   optionally an <var>allow fullscreen flag</var>, it must run the following steps:</p>
@@ -79630,6 +79641,11 @@ callback <dfn>FrameRequestCallback</dfn> = void (<span>DOMHighResTimeStamp</span
      data-x="attr-iframe-sandbox-allow-orientation-lock">allow-orientation-lock</code></dfn>
      keyword.</p></li>
 
+     <li><p>The <span>sandboxed presentation browsing context flag</span>, unless <var>tokens</var>
+     contains the <dfn><code
+     data-x="attr-iframe-sandbox-allow-presentation">allow-presentation</code></dfn>
+     keyword.</p></li>
+
     </ul>
 
    </li>
@@ -116006,6 +116022,7 @@ interface <dfn>External</dfn> {
           "<code data-x="attr-iframe-sandbox-allow-pointer-lock">allow-pointer-lock</code>",
           "<code data-x="attr-iframe-sandbox-allow-popups">allow-popups</code>",
           "<code data-x="attr-iframe-sandbox-allow-popups-to-escape-sandbox">allow-popups-to-escape-sandbox</code>",
+          "<code data-x="attr-iframe-sandbox-allow-presentation">allow-presentation</code>",
           "<code data-x="attr-iframe-sandbox-allow-same-origin">allow-same-origin</code>",
           "<code data-x="attr-iframe-sandbox-allow-scripts">allow-scripts</code> and
           "<code data-x="attr-iframe-sandbox-allow-top-navigation">allow-top-navigation</code>"
@@ -118009,6 +118026,9 @@ INSERT INTERFACES HERE
    <dt id="refsPPUTF8">[PPUTF8]</dt>
    <dd>(Non-normative) <cite><a href="http://www.sw.it.aoyama.ac.jp/2012/pub/IUC11-UTF-8.pdf">The Properties and Promises <!-- Promizes (sic) --> of UTF-8</a></cite>, M. D&uuml;rst. University of Z&uuml;rich. In <cite>Proceedings of the 11th International Unicode Conference</cite>.</dd>
 
+   <dt id="refsPRESENTATION">[PRESENTATION]</dt>
+   <dd><cite><a href="https://w3c.github.io/presentation-api/">Presentation API</a></cite>, M. Foltz, D. Röttsches. W3C.</dd>
+
    <dt id="refsPSL">[PSL]</dt>
    <dd><cite><a href="https://publicsuffix.org/">Public Suffix List</a></cite>.
    Mozilla Foundation.</dd>