Add parsing for tuple types

test/mjsunit/harmony/typesystem/tuple-types.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
+
+
+load("test/mjsunit/harmony/typesystem/typegen.js");
+
+
+// In all the following functions, the size parameter (positive integer)
+// denotes how many test cases will be tried.  The variable test_size
+// controls execution time of this test.  It should not be too high.
+let test_size = 1000;
+
+
+(function TestTupleTypes(size) {
+  Test(size, [
+    new TestGen(4, ValidTupleTypes, [CheckValid]),
+    new TestGen(1, InvalidTupleTypes, [CheckInvalid])
+  ]);
+})(test_size);