[css-variables] Fix some concept links in the API section.

Author: tabatkins

css-variables/Overview.html

@@ -763,17 +763,19 @@ <h3 id=the-cssvariablesdeclaration-interface><span class=secno>4.2. </span>
    property names</a> on a CSSStyleDeclaration object are the property names
    of all the <a href="#custom-property"><i>custom properties</i></a> in the
    <a
-   href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations">CSS
-   declaration block declarations</a>, with the "var-" prefix removed.
+   href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations"><dfn
+   id=css-declaration-block-declarations>CSS declaration block
+   declarations</dfn></a>, with the "var-" prefix removed.
 
   <p> Before running any of the algorithms in this section, prepend "var-" to
    <var>varName</var>&apos;s value.
 
   <p> When asked to <dfn id=cssvariablesdeclaration-getter title=getter>get
-   the value of a variable</dfn>, if <var>varName</var> is in the <i>CSS
-   declaration block declarations</i>, invoke <code>getPropertyValue()</code>
-   by passing <var>varName</var> as its argument, and return the returned
-   value. Otherwise, return the empty string.
+   the value of a variable</dfn>, if <var>varName</var> is in the <a
+   href="#css-declaration-block-declarations"><i>CSS declaration block
+   declarations</i></a>, invoke <code>getPropertyValue()</code> by passing
+   <var>varName</var> as its argument, and return the returned value.
+   Otherwise, return the empty string.
 
   <p> When asked to <dfn id=cssvariablesdeclaration-setter
    title=setter>set</dfn> or <dfn id=cssvariablesdeclaration-creator
@@ -1047,6 +1049,10 @@ <h2 class=no-num id=index>Index</h2>
    <li>creator, <a href="#cssvariablesdeclaration-creator"
     title="section 4.2."><strong>4.2.</strong></a>
 
+   <li>CSS declaration block declarations, <a
+    href="#css-declaration-block-declarations"
+    title="section 4.2."><strong>4.2.</strong></a>
+
    <li><a href="#cssstyledeclaration"><code>CSSStyleDeclaration</code></a>,
     <a href="#cssstyledeclaration"
     title="section 4.1."><strong>4.1.</strong></a>

css-variables/Overview.src.html

@@ -594,7 +594,7 @@ <h3 id='the-cssvariablesdeclaration-interface'>
 	<p>
 		The <a href="http://dev.w3.org/2006/webapi/WebIDL/#dfn-supported-property-names">supported property names</a>
 		on a CSSStyleDeclaration object
-		are the property names of all the <i>custom properties</i> in the <a href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations">CSS declaration block declarations</a>,
+		are the property names of all the <i>custom properties</i> in the <a href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations"><dfn>CSS declaration block declarations</dfn></a>,
 		with the "var-" prefix removed.
 
 	<p>