[parser] Add default constructor for PreParserExpression

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 9704b929dcbe201b33dbfc7aec30632105800fa4..443b3385f7bf0b904fa0b8348694e5914403b0ae 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -117,8 +117,10 @@ class PreParserIdentifier {
 
 class PreParserExpression {
  public:
+  PreParserExpression() : code_(TypeField::encode(kExpression)) {}
+
   static PreParserExpression Default() {
-    return PreParserExpression(TypeField::encode(kExpression));
+    return PreParserExpression();
   }
 
   static PreParserExpression Spread(PreParserExpression expression) {