squash! Manually finish converion to Bikeshed

Export "top layer" and its add/remove concepts.

fullscreen.bs

@@ -526,7 +526,7 @@ here is sketchy as hell.
 
 <p>This specification introduces a new stacking layer to the
 <a href=http://www.w3.org/TR/CSS21/zindex.html>Elaborate description of Stacking Contexts</a>
-of CSS 2.1. It is called the <dfn>top layer</dfn>, comes after step 10 in
+of CSS 2.1. It is called the <dfn export>top layer</dfn>, comes after step 10 in
 the painting order, and is therefore rendered closest to the user within a
 viewport. Each <a>document</a> has one
 associated viewport and therefore also one <a>top layer</a>.
@@ -582,11 +582,11 @@ user.
  <code>top</code> is zero.
 </ul>
 
-<p>To <dfn id=concept-top-layer-add>add</dfn> an <var>element</var> to a
+<p>To <dfn export for="top layer" id=concept-top-layer-add>add</dfn> an <var>element</var> to a
 <var>top layer</var>, add, or move if already present, <var>element</var> on top of
 <var>top layer</var>.
 
-<p>To <dfn id=concept-top-layer-remove>remove</dfn> an <var>element</var> from a
+<p>To <dfn export for="top layer" id=concept-top-layer-remove>remove</dfn> an <var>element</var> from a
 <var>top layer</var>, remove <var>element</var> from <var>top layer</var>.
 
 

fullscreen.html

@@ -71,7 +71,7 @@
    <p data-fill-with="logo"><a class="logo" href="https://whatwg.org/"> <img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-fullscreen.svg"> </a> </p>
    <hgroup>
     <h1 class="p-name no-ref" id="title">Fullscreen API</h1>
-    <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Living Standard — Last Updated <time class="dt-updated" datetime="2016-09-13">13 September 2016</time></span></h2>
+    <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Living Standard — Last Updated <time class="dt-updated" datetime="2016-09-14">14 September 2016</time></span></h2>
    </hgroup>
    <div data-fill-with="spec-metadata">
     <dl>
@@ -389,7 +389,7 @@ <h2 class="heading settled" data-level="6" id="rendering"><span class="secno">6.
 and its associated <a class="css" data-link-type="selector" href="#css-pe-backdrop"><code>::backdrop</code></a> pseudo-element as part of CSS' stacking context model. Patching CSS as done
 here is sketchy as hell. </p>
    <h3 class="heading settled" data-level="6.1" id="new-stacking-layer"><span class="secno">6.1. </span><span class="content">New stacking layer</span><a class="self-link" href="#new-stacking-layer"></a></h3>
-   <p>This specification introduces a new stacking layer to the <a href="http://www.w3.org/TR/CSS21/zindex.html">Elaborate description of Stacking Contexts</a> of CSS 2.1. It is called the <dfn data-dfn-type="dfn" data-noexport="" id="top-layer">top layer<a class="self-link" href="#top-layer"></a></dfn>, comes after step 10 in
+   <p>This specification introduces a new stacking layer to the <a href="http://www.w3.org/TR/CSS21/zindex.html">Elaborate description of Stacking Contexts</a> of CSS 2.1. It is called the <dfn data-dfn-type="dfn" data-export="" id="top-layer">top layer<a class="self-link" href="#top-layer"></a></dfn>, comes after step 10 in
 the painting order, and is therefore rendered closest to the user within a
 viewport. Each <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document">document</a> has one
 associated viewport and therefore also one <a data-link-type="dfn" href="#top-layer">top layer</a>. <a data-link-type="biblio" href="#biblio-css">[CSS]</a> </p>
@@ -427,8 +427,8 @@ <h3 class="heading settled" data-level="6.1" id="new-stacking-layer"><span class
     <li>
      <p>Unless overridden by another specification, its static position for <code>left</code>, <code>right</code>, and <code>top</code> is zero. </p>
    </ul>
-   <p>To <dfn data-dfn-type="dfn" data-noexport="" id="concept-top-layer-add">add<a class="self-link" href="#concept-top-layer-add"></a></dfn> an <var>element</var> to a <var>top layer</var>, add, or move if already present, <var>element</var> on top of <var>top layer</var>. </p>
-   <p>To <dfn data-dfn-type="dfn" data-noexport="" id="concept-top-layer-remove">remove<a class="self-link" href="#concept-top-layer-remove"></a></dfn> an <var>element</var> from a <var>top layer</var>, remove <var>element</var> from <var>top layer</var>. </p>
+   <p>To <dfn data-dfn-for="top layer" data-dfn-type="dfn" data-export="" id="concept-top-layer-add">add<a class="self-link" href="#concept-top-layer-add"></a></dfn> an <var>element</var> to a <var>top layer</var>, add, or move if already present, <var>element</var> on top of <var>top layer</var>. </p>
+   <p>To <dfn data-dfn-for="top layer" data-dfn-type="dfn" data-export="" id="concept-top-layer-remove">remove<a class="self-link" href="#concept-top-layer-remove"></a></dfn> an <var>element</var> from a <var>top layer</var>, remove <var>element</var> from <var>top layer</var>. </p>
    <h3 class="heading settled" data-level="6.2" id="::backdrop-pseudo-element"><span class="secno">6.2. </span><span class="content"><code>::backdrop</code> pseudo-element</span><a class="self-link" href="#%3A%3Abackdrop-pseudo-element"></a></h3>
    <p>Each element in a <a data-link-type="dfn" href="#top-layer">top layer</a> has a <dfn class="css" data-dfn-type="selector" data-export="" id="css-pe-backdrop"><code>::backdrop</code><a class="self-link" href="#css-pe-backdrop"></a></dfn> pseudo-element.
 This pseudo-element is a box rendered immediately below the element (and