[intl] Create the Intl constructors to C++

test/intl/toStringTag.js

Index: test/intl/toStringTag.js
diff --git a/test/intl/toStringTag.js b/test/intl/toStringTag.js
new file mode 100644
index 0000000000000000000000000000000000000000..e215bcb73623a6e9188c46cd3b85ce7c516406fe
--- /dev/null
+++ b/test/intl/toStringTag.js
@@ -0,0 +1,29 @@
+// 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.
+
+let descriptor;
+
+descriptor = Object.getOwnPropertyDescriptor(Intl.DateTimeFormat.prototype,
+                                             Symbol.toStringTag);
+
+assertEquals("Object", descriptor.value);
+assertFalse(descriptor.writable);
+assertFalse(descriptor.enumerable);
+assertTrue(descriptor.configurable);
+
+descriptor = Object.getOwnPropertyDescriptor(Intl.NumberFormat.prototype,
+                                             Symbol.toStringTag);
+
+assertEquals("Object", descriptor.value);
+assertFalse(descriptor.writable);
+assertFalse(descriptor.enumerable);
+assertTrue(descriptor.configurable);
+
+descriptor = Object.getOwnPropertyDescriptor(Intl.Collator.prototype,
+                                             Symbol.toStringTag);
+
+assertEquals("Object", descriptor.value);
+assertFalse(descriptor.writable);
+assertFalse(descriptor.enumerable);
+assertTrue(descriptor.configurable);