[intl] Add new semantics + compat fallback to Intl constructor

test/mjsunit/regress/regress-4870.js

Index: test/mjsunit/regress/regress-4870.js
diff --git a/test/mjsunit/regress/regress-4870.js b/test/mjsunit/regress/regress-4870.js
new file mode 100644
index 0000000000000000000000000000000000000000..0bbe903acb3b0a1bdef7df4b04c0d0ca63cabf0d
--- /dev/null
+++ b/test/mjsunit/regress/regress-4870.js
@@ -0,0 +1,7 @@
+// 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.
+

[Yang, 2016/12/23 09:05:46]

80 char limit

[Dan Ehrenberg, 2016/12/23 14:01:53]

Done.

+assertThrows(() => Object.getOwnPropertyDescriptor(Intl.Collator.prototype, 'compare')
+                   .get.call(new Intl.DateTimeFormat())('a', 'b'),
+             TypeError)