[parser] unify metaproperty parsing and require unescaped property name

test/message/new-target-escaped.js

Index: test/message/new-target-escaped.js
diff --git a/test/mjsunit/ignition/dead-code-source-position.js b/test/message/new-target-escaped.js
similarity index 79%
copy from test/mjsunit/ignition/dead-code-source-position.js
copy to test/message/new-target-escaped.js
index 95bb9183b880229a703e58503e9aec2a673015aa..f8398bebd4dda6d8568b3f80cbc85ed2c6d6710e 100644
--- a/test/mjsunit/ignition/dead-code-source-position.js
+++ b/test/message/new-target-escaped.js
@@ -1,9 +1,10 @@
 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+//
+//
 
 function f() {
-  for (f(x) in []) { f(new f()) }
+  return new.t\u0061rget;
 }
-
-f();
+var o = new f();