[css-animations] Link SyntaxError to webidl spec

Author: Sylvain Galineau

css-animations/Overview.bs

@@ -20,7 +20,7 @@ Abstract: This CSS module describes a way for authors to animate the values of C
 
 At Risk: the <code>pseudoElement</code> property of the ''AnimationEvent'' interface
 
-Link Defaults: css-values-3 (type) <time>, cssom-1 (interface) cssstyledeclaration, dom-core-ls (interface) event
+Link Defaults: css-values-3 (type) <time>, cssom-1 (interface) cssstyledeclaration, dom-core-ls (interface) event, webidl (type) SyntaxError
 Ignored Terms: domstring, float, animationeventinit, event, eventinit, eventtarget, document
 </pre>
 
@@ -907,7 +907,7 @@ Attributes</h4>
 			respectively.
 
             If <a attribute for="CSSKeyFramesRule">keyText</a> is updated with an invalid keyframe selector, 
-            a SyntaxError exception must be thrown.
+            a <a spec="webidl">SyntaxError</a> exception must be thrown.
 
 		<dt><dfn>style</dfn>, of type <a interface>CSSStyleDeclaration</a>
 		<dd>

css-animations/Overview.html

@@ -924,7 +924,7 @@ <h4 class="heading settled heading" data-level=6.2.2 id=interface-csskeyframerul
 			respectively.
 
 <p>            If <a class=idl-code data-link-for=CSSKeyFramesRule data-link-type=attribute href=#dom-csskeyframesrule-keytext title=keytext>keyText</a> is updated with an invalid keyframe selector, 
-            a SyntaxError exception must be thrown.
+            a <a data-link-spec=webidl data-link-type=dfn href=https://heycam.github.io/webidl/#syntaxerror title=syntaxerror>SyntaxError</a> exception must be thrown.
 
 		<dt><dfn class=idl-code data-dfn-for=csskeyframerule data-dfn-type=attribute data-export="" id=dom-csskeyframerule-style>style<a class=self-link href=#dom-csskeyframerule-style></a></dfn>, of type <a class=idl-code data-link-type=interface href=http://dev.w3.org/csswg/cssom-1/#cssstyledeclaration title=cssstyledeclaration>CSSStyleDeclaration</a>
 		<dd>