[es6] support spread-calling Super-accessing properties

test/mjsunit/harmony/spread-call-super-property.js

+// Copyright 2015 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-spreadcalls --harmony-sloppy --harmony-rest-parameters
+
+(function testCallSuperProperty() {
+  class BaseClass {
+    strict_method(...args) { "use strict"; return [this].concat(args); }
+    sloppy_method(...args) { return [this].concat(args); }
+  }
+  class SubClass extends BaseClass {
+    strict_m(...args) { return super.strict_method(...args); }
+    sloppy_m(...args) { return super.sloppy_method(...args); }
+  }
+
+  var c = new SubClass();
+  assertEquals([c, 1, 2, 3, 4, 5], c.strict_m(1, 2, 3, 4, 5));
+  assertEquals([c, 1, 2, 3, 4, 5], c.sloppy_m(1, 2, 3, 4, 5));
+})();