Read zone() directly from parser_ in ParserTraits

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index b7761564f26abe1031a68d1f486f4843d14f61e8..0c0417e501454ee7785ed2b436affae41b907aee 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -5859,11 +5859,7 @@ ParserTraits::GetReportedErrorList() const {
   return parser_->function_state_->GetReportedErrorList();
 }
 
-
-Zone* ParserTraits::zone() const {
-  return parser_->function_state_->scope()->zone();
-}
-
+Zone* ParserTraits::zone() const { return parser_->zone(); }
 
 class NonPatternRewriter : public AstExpressionRewriter {
  public: