Properly disallow 'yield' in class expressions and arrow parameters

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 3fd3ce84807547a6ca8799c7ade400d0c74a616c..75d5c18a5441c9c88b07157cb2bec080d8d7f51d 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -891,7 +891,8 @@ class PreParserTraits {
       int function_token_position, FunctionLiteral::FunctionType type,
       LanguageMode language_mode, bool* ok);
 
-  PreParserExpression ParseClassLiteral(PreParserIdentifier name,
+  PreParserExpression ParseClassLiteral(Type::ExpressionClassifier* classifier,
+                                        PreParserIdentifier name,
                                         Scanner::Location class_name_location,
                                         bool name_is_strict_reserved, int pos,
                                         bool* ok);
@@ -1096,7 +1097,8 @@ class PreParser : public ParserBase<PreParserTraits> {
   void ParseLazyFunctionLiteralBody(bool* ok,
                                     Scanner::BookmarkScope* bookmark = nullptr);
 
-  PreParserExpression ParseClassLiteral(PreParserIdentifier name,
+  PreParserExpression ParseClassLiteral(ExpressionClassifier* classifier,
+                                        PreParserIdentifier name,
                                         Scanner::Location class_name_location,
                                         bool name_is_strict_reserved, int pos,
                                         bool* ok);