Restore Node.prototype.isSameNode()

Fixes https://www.w3.org/Bugs/Public/show_bug.cgi?id=27424.

dom.bs

@@ -2981,6 +2981,7 @@ interface Node : EventTarget {
 
   [NewObject] Node cloneNode(optional boolean deep = false);
   boolean isEqualNode(Node? otherNode);
+  boolean isSameNode(Node? otherNode); // historical alias of ===
 
   const unsigned short DOCUMENT_POSITION_DISCONNECTED = 0x01;
   const unsigned short DOCUMENT_POSITION_PRECEDING = 0x02;
@@ -3633,11 +3634,12 @@ A <a>node</a> <var>A</var>
  <a>index</a>.
 </ul>
 
-The
-<dfn method for=Node>isEqualNode(<var>otherNode</var>)</dfn>
-method must return true if <var>node</var> is not null and
-<a>context object</a> <a for=Node>equals</a>
-<var>otherNode</var>, and false otherwise.
+<p>The <dfn method for=Node><code>isEqualNode(<var>otherNode</var>)</code></dfn> method, when
+invoked, must return true if <var>otherNode</var> is non-null and <a>context object</a>
+<a for=Node>equals</a> <var>otherNode</var>, and false otherwise.
+
+<p>The <dfn method for=Node><code>isSameNode(<var>otherNode</var>)</code></dfn> method, when
+invoked, must return true if <var>otherNode</var> is <a>context object</a>, and false otherwise.
 
 </div>
 
@@ -8895,8 +8897,6 @@ Interface members:
    <li><dfn method for=Node>getFeature()</dfn>
    <li><dfn method for=Node>getUserData()</dfn>
    <li><dfn method for=Node>setUserData()</dfn>
-
-   <li><dfn method for=Node>isSameNode()</dfn>
   </ul>
 
  <dt>{{Document}}

dom.html

@@ -69,7 +69,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://whatwg.org/"> <img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-dom.svg"> </a> </p>
    <h1 class="p-name no-ref allcaps" id="title">DOM</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="2016-03-07">7 March 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="2016-03-14">14 March 2016</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>Participate:
@@ -1765,6 +1765,7 @@ <h3 class="heading settled" data-level="4.4" id="interface-node"><span class="se
 
   [NewObject] <a data-link-type="idl-name" href="#node">Node</a> <a class="idl-code" data-link-type="method" href="#dom-node-clonenode">cloneNode</a>(optional boolean <dfn class="idl-code" data-dfn-for="Node/cloneNode(deep), Node/cloneNode()" data-dfn-type="argument" data-export="" id="dom-node-clonenode-deep-deep">deep<a class="self-link" href="#dom-node-clonenode-deep-deep"></a></dfn> = false);
   boolean <a class="idl-code" data-link-type="method" href="#dom-node-isequalnode">isEqualNode</a>(<a data-link-type="idl-name" href="#node">Node</a>? <dfn class="idl-code" data-dfn-for="Node/isEqualNode(otherNode)" data-dfn-type="argument" data-export="" id="dom-node-isequalnode-othernode-othernode">otherNode<a class="self-link" href="#dom-node-isequalnode-othernode-othernode"></a></dfn>);
+  boolean <a class="idl-code" data-link-type="method" href="#dom-node-issamenode">isSameNode</a>(<a data-link-type="idl-name" href="#node">Node</a>? <dfn class="idl-code" data-dfn-for="Node/isSameNode(otherNode)" data-dfn-type="argument" data-export="" id="dom-node-issamenode-othernode-othernode">otherNode<a class="self-link" href="#dom-node-issamenode-othernode-othernode"></a></dfn>); // historical alias of ===
 
   const unsigned short <a class="idl-code" data-link-type="const" href="#dom-node-document_position_disconnected">DOCUMENT_POSITION_DISCONNECTED</a> = 0x01;
   const unsigned short <a class="idl-code" data-link-type="const" href="#dom-node-document_position_preceding">DOCUMENT_POSITION_PRECEDING</a> = 0x02;
@@ -2085,7 +2086,10 @@ <h3 class="heading settled" data-level="4.4" id="interface-node"><span class="se
      <li><var>A</var> and <var>B</var> have the same number of <a data-link-type="dfn" href="#concept-tree-child">children</a>. 
      <li>Each <a data-link-type="dfn" href="#concept-tree-child">child</a> of <var>A</var> <a data-link-type="dfn" href="#concept-node-equals">equals</a> the <a data-link-type="dfn" href="#concept-tree-child">child</a> of <var>B</var> at the identical <a data-link-type="dfn" href="#concept-tree-index">index</a>. 
     </ul>
-    <p>The <dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-isequalnode">isEqualNode(<var>otherNode</var>)<a class="self-link" href="#dom-node-isequalnode"></a></dfn> method must return true if <var>node</var> is not null and <a data-link-type="dfn" href="#context-object">context object</a> <a data-link-type="dfn" href="#concept-node-equals">equals</a> <var>otherNode</var>, and false otherwise.</p>
+    <p>The <dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-isequalnode"><code>isEqualNode(<var>otherNode</var>)</code><a class="self-link" href="#dom-node-isequalnode"></a></dfn> method, when
+invoked, must return true if <var>otherNode</var> is non-null and <a data-link-type="dfn" href="#context-object">context object</a> <a data-link-type="dfn" href="#concept-node-equals">equals</a> <var>otherNode</var>, and false otherwise. </p>
+    <p>The <dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-issamenode"><code>isSameNode(<var>otherNode</var>)</code><a class="self-link" href="#dom-node-issamenode"></a></dfn> method, when
+invoked, must return true if <var>otherNode</var> is <a data-link-type="dfn" href="#context-object">context object</a>, and false otherwise. </p>
    </div>
    <hr>
    <dl class="domintro">
@@ -4431,7 +4435,6 @@ <h3 class="heading settled" data-level="8.2" id="dom-core-changes"><span class="
       <li><dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-getfeature">getFeature()<a class="self-link" href="#dom-node-getfeature"></a></dfn> 
       <li><dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-getuserdata">getUserData()<a class="self-link" href="#dom-node-getuserdata"></a></dfn> 
       <li><dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-setuserdata">setUserData()<a class="self-link" href="#dom-node-setuserdata"></a></dfn> 
-      <li><dfn class="idl-code" data-dfn-for="Node" data-dfn-type="method" data-export="" id="dom-node-issamenode">isSameNode()<a class="self-link" href="#dom-node-issamenode"></a></dfn> 
      </ul>
     <dt><code class="idl"><a data-link-type="idl" href="#document">Document</a></code> 
     <dd>
@@ -4983,7 +4986,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dom-text-iselementcontentwhitespace">isElementContentWhitespace</a><span>, in §8.2</span>
    <li><a href="#dom-node-isequalnode">isEqualNode(otherNode)</a><span>, in §4.4</span>
    <li><a href="#dom-range-ispointinrange">isPointInRange(node, offset)</a><span>, in §5.2</span>
-   <li><a href="#dom-node-issamenode">isSameNode()</a><span>, in §8.2</span>
+   <li><a href="#dom-node-issamenode">isSameNode(otherNode)</a><span>, in §4.4</span>
    <li><a href="#dom-node-issupported">isSupported</a><span>, in §8.2</span>
    <li><a href="#dom-event-istrusted">isTrusted</a><span>, in §3.2</span>
    <li>
@@ -5683,6 +5686,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
 
   [NewObject] <a data-link-type="idl-name" href="#node">Node</a> <a class="idl-code" data-link-type="method" href="#dom-node-clonenode">cloneNode</a>(optional boolean <a href="#dom-node-clonenode-deep-deep">deep</a> = false);
   boolean <a class="idl-code" data-link-type="method" href="#dom-node-isequalnode">isEqualNode</a>(<a data-link-type="idl-name" href="#node">Node</a>? <a href="#dom-node-isequalnode-othernode-othernode">otherNode</a>);
+  boolean <a class="idl-code" data-link-type="method" href="#dom-node-issamenode">isSameNode</a>(<a data-link-type="idl-name" href="#node">Node</a>? <a href="#dom-node-issamenode-othernode-othernode">otherNode</a>); // historical alias of ===
 
   const unsigned short <a class="idl-code" data-link-type="const" href="#dom-node-document_position_disconnected">DOCUMENT_POSITION_DISCONNECTED</a> = 0x01;
   const unsigned short <a class="idl-code" data-link-type="const" href="#dom-node-document_position_preceding">DOCUMENT_POSITION_PRECEDING</a> = 0x02;