Reduce the memory footprint of expression classifiers

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 16eeab440ad1042456913a2e14a1f1979c2017cf..7278b6319e43aba825d86fc03656d8bf6f1caa1d 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -987,6 +987,8 @@ class PreParserTraits {
   inline PreParserExpression RewriteAwaitExpression(PreParserExpression value,
                                                     int pos);
 
+  V8_INLINE ZoneList<typename Type::ExpressionClassifier::Error>*
+      GetReportedErrorList() const;
   V8_INLINE Zone* zone() const;
   V8_INLINE ZoneList<PreParserExpression>* GetNonPatternList() const;
 
@@ -1214,13 +1216,19 @@ PreParserExpression PreParserTraits::RewriteAwaitExpression(
   return value;
 }
 
-Zone* PreParserTraits::zone() const {
-  return pre_parser_->function_state_->scope()->zone();
+ZoneList<PreParserExpression>* PreParserTraits::GetNonPatternList() const {
+  return pre_parser_->function_state_->non_patterns_to_rewrite();
 }
 
 
-ZoneList<PreParserExpression>* PreParserTraits::GetNonPatternList() const {
-  return pre_parser_->function_state_->non_patterns_to_rewrite();
+ZoneList<typename PreParserTraits::Type::ExpressionClassifier::Error>*
+PreParserTraits::GetReportedErrorList() const {
+  return pre_parser_->function_state_->GetReportedErrorList();
+}
+
+
+Zone* PreParserTraits::zone() const {
+  return pre_parser_->function_state_->scope()->zone();
 }