Use FrozenArray for the attributes.

Author: tabatkins

css-parser-api/Overview.bs

@@ -91,32 +91,32 @@ interface CSSParserRule {
 
 interface CSSParserAtRule : CSSParserRule {
 	attribute DOMString name;
-	attribute sequence<CSSParserValue> prelude;
-	attribute sequence<CSSParserRule>? body;
+	attribute FrozenArray<CSSParserValue> prelude;
+	attribute FrozenArray<CSSParserRule>? body;
 	/* nullable to handle at-statements */
 };
 
 interface CSSParserQualifiedRule : CSSParserRule {
-	attribute sequence<CSSParserValue> prelude;
-	attribute sequence<CSSParserRule> body;
+	attribute FrozenArray<CSSParserValue> prelude;
+	attribute FrozenArray<CSSParserRule> body;
 };
 
 interface CSSParserDeclaration : CSSParserRule {
 	attribute DOMString name;
-	attribute sequence<CSSParserValue> body;
+	attribute FrozenArray<CSSParserValue> body;
 };
 
 interface CSSParserValue {
 };
 
 interface CSSParserBlock : CSSParserValue {
 	attribute DOMString name; /* "[]", "{}", or "()" */
-	attribute sequence<CSSParserValue> body;
+	attribute FrozenArray<CSSParserValue> body;
 };
 
 interface CSSParserFunction : CSSParserValue {
 	attribute DOMString name;
-	attribute sequence<sequence<CSSParserValue>> args;
+	attribute FrozenArray<FrozenArray<CSSParserValue>> args;
 };
 
 interface CSSParserIdent : CSSParserValue {