[classes] Support AccessorInfo-style data properties in super property stores.

test/mjsunit/es6/classes-super.js

Index: test/mjsunit/es6/classes-super.js
diff --git a/test/mjsunit/regress/regress-4659.js b/test/mjsunit/es6/classes-super.js
similarity index 55%
copy from test/mjsunit/regress/regress-4659.js
copy to test/mjsunit/es6/classes-super.js
index ff436bec1b07d6a708ddd0a0c454ada3c353985c..7bdf4ba86c1c44c6915a046e7ad48cf463da2c20 100644
--- a/test/mjsunit/regress/regress-4659.js
+++ b/test/mjsunit/es6/classes-super.js
@@ -1,12 +1,15 @@
 // 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-function-name
 
-var obj = {
-  get longerName(){
-    return 42;
+"use strict";
+
+class Test {
+  m() {
+    super.length = 10;
   }
-};
-assertEquals(42, obj.longerName);
+}
+
+var array = [];
+Test.prototype.m.call(array);
+assertEquals(10, array.length);