Reduce the memory footprint of expression classifiers

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index bfed5f347106058805edcb316be7a7f5d7059ab8..02c4af7fbe2c43764afc6f9ab014964a4a984708 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -670,6 +670,8 @@ class ParserTraits {
   V8_INLINE void RewriteNonPattern(Type::ExpressionClassifier* classifier,
                                    bool* ok);
 
+  V8_INLINE ZoneList<typename Type::ExpressionClassifier::Error>*
+      GetReportedErrorList() const;
   V8_INLINE Zone* zone() const;
 
   V8_INLINE ZoneList<Expression*>* GetNonPatternList() const;