Also make KeywordValue's keywordValue attribute readonly

wilddamon · wilddamon · commit 800bfb574605 · 2016-07-11T17:21:52.000+10:00
diff --git a/css-typed-om/Overview.bs b/css-typed-om/Overview.bs
@@ -240,7 +240,7 @@ interface CSSVariableReferenceValue {
 <pre class='idl'>
 [Constructor(DOMString)]
 interface CSSKeywordValue : CSSStyleValue {
-	attribute DOMString keywordValue;
+	readonly attribute DOMString keywordValue;
 };
 </pre>
 
