[parser] parenthesized Literals are not valid AssignmentPatterns

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 9253ad5e518f93b9cfc08393a475912eb6377e85..d3fc145ccbb0c6c5041a46295aeddc38c518bb9f 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -279,6 +279,10 @@ class PreParserExpression {
   int position() const { return RelocInfo::kNoPosition; }
   void set_function_token_position(int position) {}
 
+  // Parenthesized expressions in the form `( Expression )`.
+  void set_is_parenthesized() { code_ |= ParenthesizedField::encode(true); }
+  bool is_parenthesized() const { return ParenthesizedField::decode(code_); }
+
  private:
   enum Type {
     kExpression,
@@ -314,6 +318,7 @@ class PreParserExpression {
   typedef BitField<PreParserIdentifier::Type, TypeField::kNext, 10>
       IdentifierTypeField;
   typedef BitField<bool, TypeField::kNext, 1> HasCoverInitializedNameField;
+  typedef BitField<bool, 31, 1> ParenthesizedField;
 
   uint32_t code_;
 };