(Pre)Parser: Simplify NewExpression handling.

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index cbc92da851454a7a173abe51d49ec8c464a06930..234dde9bd7d7ec9d5334c096549901bdea882ca4 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -854,9 +854,8 @@ class PreParser : public ParserBase<PreParserTraits> {
   Expression ParseUnaryExpression(bool* ok);
   Expression ParsePostfixExpression(bool* ok);
   Expression ParseLeftHandSideExpression(bool* ok);
-  Expression ParseNewExpression(bool* ok);
   Expression ParseMemberExpression(bool* ok);
-  Expression ParseMemberWithNewPrefixesExpression(unsigned new_count, bool* ok);
+  Expression ParseMemberWithNewPrefixesExpression(bool* ok);
   Expression ParseArrayLiteral(bool* ok);
   Expression ParseObjectLiteral(bool* ok);
   Expression ParseV8Intrinsic(bool* ok);