Add parsing for type queries

test/mjsunit/harmony/typesystem/type-query.js

+// 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.
+
+// Flags: --harmony-types
+
+function CheckValid(type) {
+  // print("V:", type);
+  assertDoesNotThrow("'use types'; var x: " + type + ";");
+}
+
+function CheckInvalid(type) {
+  // print("I:", type);
+  assertThrows("'use types'; var x: " + type + ";", SyntaxError);
+}
+
+function valid(type) {
+  CheckValid(type);
+  CheckValid(type + "[]");
+  CheckValid(type + " & any");
+  CheckValid(type + " | any");
+  CheckValid("(" + type + ")[]");
+  CheckValid("(a: " + type + ") => any");
+}
+
+function invalid(type) {
+  CheckInvalid(type);
+  CheckInvalid(type + "[]");
+  CheckInvalid(type + " & any");
+  CheckInvalid(type + " | any");
+  CheckInvalid("(" + type + ")[]");
+  CheckInvalid("(a: " + type + ") => any");
+}
+
+(function TestTypeQueries() {
+  valid("typeof x");
+  valid("typeof x.a");
+  valid("typeof x.something.something_else");
+  valid("typeof x.a.b.c.d.e.f.g.h.i.j.k.l");
+
+  invalid("typeof");
+  invalid("typeof x.");
+  invalid("typeof x.a.b.c.d.e.f.g.h.i.j.k.l.");
+  invalid("typeof x => any");
+})();