[parser] Hide expression classifiers in parser implementation

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 8d739480825a35c2ec03ad813af9870ad02f6b35..7b126d287492fb143052fce5d5f0bc02a8d96b2c 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -782,8 +782,7 @@ class PreParser : public ParserBase<PreParser> {
   void ParseLazyFunctionLiteralBody(bool* ok,
                                     Scanner::BookmarkScope* bookmark = nullptr);
 
-  PreParserExpression ParseClassLiteral(ExpressionClassifier* classifier,
-                                        PreParserIdentifier name,
+  PreParserExpression ParseClassLiteral(PreParserIdentifier name,
                                         Scanner::Location class_name_location,
                                         bool name_is_strict_reserved, int pos,
                                         bool* ok);
@@ -805,7 +804,6 @@ class PreParser : public ParserBase<PreParser> {
 
   void ParseAsyncArrowSingleExpressionBody(PreParserStatementList body,
                                            bool accept_IN,
-                                           ExpressionClassifier* classifier,
                                            int pos, bool* ok);
 
   V8_INLINE PreParserExpressionList
@@ -841,9 +839,7 @@ class PreParser : public ParserBase<PreParser> {
                                                  int pos) {
     return PreParserExpression::Default();
   }
-  V8_INLINE void RewriteNonPattern(ExpressionClassifier* classifier, bool* ok) {
-    ValidateExpression(classifier, ok);
-  }
+  V8_INLINE void RewriteNonPattern(bool* ok) { ValidateExpression(ok); }
 
   V8_INLINE void QueueDestructuringAssignmentForRewriting(
       PreParserExpression assignment) {}
@@ -1097,9 +1093,8 @@ class PreParser : public ParserBase<PreParser> {
   }
 
   V8_INLINE void DeclareFormalParameter(DeclarationScope* scope,
-                                        PreParserIdentifier parameter,
-                                        ExpressionClassifier* classifier) {
-    if (!classifier->is_simple_parameter_list()) {
+                                        PreParserIdentifier parameter) {
+    if (!classifier()->is_simple_parameter_list()) {
       scope->SetHasNonSimpleParameters();
     }
   }