Add optional types to function/method declarations

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index ebe14a98de7f5dd1bf38ba7ae277ac59f717f758..96c01746e06f87230c4f2f83bfb99b1841b01d33 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -606,7 +606,7 @@ class ParserTraits {
       const AstRawString* name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_position, FunctionLiteral::FunctionType type,
-      LanguageMode language_mode, bool* ok);
+      LanguageMode language_mode, typesystem::TypeFlags type_flags, bool* ok);
   V8_INLINE void SkipLazyFunctionBody(
       int* materialized_literal_count, int* expected_property_count, bool* ok,
       Scanner::BookmarkScope* bookmark = nullptr);
@@ -997,7 +997,7 @@ class Parser : public ParserBase<ParserTraits> {
       const AstRawString* name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_position, FunctionLiteral::FunctionType type,
-      LanguageMode language_mode, bool* ok);
+      LanguageMode language_mode, typesystem::TypeFlags type_flags, bool* ok);
 
 
   ClassLiteral* ParseClassLiteral(const AstRawString* name,