[parser] improve inferred function names for async arrow functions

src/parsing/preparser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/base/hashmap.h"
@@ skipping 812 matching lines @@
                                                     int pos) {
     return PreParserExpression::Default();
   }
 
   static PreParserExpression ExpressionFromLiteral(
       Token::Value token, int pos, Scanner* scanner,
       PreParserFactory* factory) {
     return PreParserExpression::Default();
   }
 
-  static PreParserExpression ExpressionFromIdentifier(PreParserIdentifier name,
-                                                      int start_position,
-                                                      int end_position) {
+  static PreParserExpression ExpressionFromIdentifier(
+      PreParserIdentifier name, int start_position, int end_position,
+      InferName = InferName::Yes) {
     return PreParserExpression::FromIdentifier(name);
   }
 
   PreParserExpression ExpressionFromString(int pos,
                                            Scanner* scanner,
                                            PreParserFactory* factory = NULL);
 
   PreParserExpression GetIterator(PreParserExpression iterable,
                                   PreParserFactory* factory, int pos) {
     return PreParserExpression::Default();
@@ skipping 412 matching lines @@
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   return pre_parser_->ParseEagerFunctionBody(function_name, pos, parameters,
                                              kind, function_type, ok);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H