Bikeshed update for 'Use document.scrollingElement where appropriate (#33)

Fixes #14' [ci skip]

Generated from:

commit 77803dc
Author: Stephen McGruer 
Date:   Wed Nov 21 15:15:30 2018 -0500

    Use document.scrollingElement where appropriate (#33)

    Fixes #14

Author: stephenmcgruer

index.html

@@ -11,7 +11,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2016/W3C-UD" rel="stylesheet" type="text/css">
   <meta content="Bikeshed version 0da7328bb90ef81993146377e4e0fed236969c4c" name="generator">
   <link href="https://wicg.github.io/scroll-animations/" rel="canonical">
-  <meta content="f566763248e1f7651d5c8af5871cf10c717233e7" name="document-revision">
+  <meta content="77803dcc67881b47bb46abbd1a4b34f0d72b431f" name="document-revision">
   <link href="web-animations.css" rel="stylesheet" type="text/css">
 <style>/* style-md-lists */
 
       <dd data-md>
        <p>The scrollable element whose scrolling triggers the activation and drives the
 progress of the timeline.p>
-       <p>If this is not specified, the document element of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#active-document" id="ref-for-active-document">active documenta> for the
-current <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#browsing-context" id="ref-for-browsing-context">browsing contexta>, as determined at the time the <code class="idl"><a data-link-type="idl" href="#scrolltimeline" id="ref-for-scrolltimeline③">ScrollTimelinea>code> is
-constructed, is used.p>
+       <p>If this is not specified, the <code class="idl"><a data-link-type="idl" href="https://drafts.csswg.org/cssom-view-1/#dom-document-scrollingelement" id="ref-for-dom-document-scrollingelement">scrollingElementa>code> of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#active-document" id="ref-for-active-document">active documenta> for the current <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#browsing-context" id="ref-for-browsing-context">browsing contexta>, as determined at the time the <code class="idl"><a data-link-type="idl" href="#scrolltimeline" id="ref-for-scrolltimeline③">ScrollTimelinea>code> is constructed, is used.p>
        <p>Note that the <code class="idl"><a data-link-type="idl" href="#dom-scrolltimeline-scrollsource" id="ref-for-dom-scrolltimeline-scrollsource①">scrollSourcea>code>'s <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#dom-node-ownerdocument" id="ref-for-dom-node-ownerdocument">ownerDocumenta>code> may change over the lifetime
 of the scroll timeline. This does not affect the scroll timeline; the timeline
 continues to be driven by the scroll progress of the <code class="idl"><a data-link-type="idl" href="#dom-scrolltimeline-scrollsource" id="ref-for-dom-scrolltimeline-scrollsource②">scrollSourcea>code>.p>
@@ -1113,6 +1111,12 @@ 
    ul>
   aside>
+  <aside class="dfn-panel" data-for="term-for-dom-document-scrollingelement">
+   <a href="https://drafts.csswg.org/cssom-view-1/#dom-document-scrollingelement">https://drafts.csswg.org/cssom-view-1/#dom-document-scrollingelementa><b>Referenced in:b>
+   <ul>
+    <li><a href="#ref-for-dom-document-scrollingelement">3.1.2. The ScrollTimeline interfacea>
+   ul>
+  aside>
   <aside class="dfn-panel" data-for="term-for-element">
    <a href="https://dom.spec.whatwg.org/#element">https://dom.spec.whatwg.org/#elementa><b>Referenced in:b>
    <ul>
     <a data-link-type="biblio">[cssom-view-1]a> defines the following terms:
     <ul>
      <li><span class="dfn-paneled" id="term-for-css-layout-box" style="color:initial">css layout boxspan>
+     <li><span class="dfn-paneled" id="term-for-dom-document-scrollingelement" style="color:initial">scrollingElementspan>
     ul>
    <li>
     <a data-link-type="biblio">[DOM]a> defines the following terms: