dart2js cps: Direct access on JS arrays.

tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Tests of interceptors.
 
 library supercall_test;
 
 import 'js_backend_cps_ir.dart';
 
@@ skipping 35 matching lines @@
 // function(x) {
 //   var v0, v1, v2;
 //   v0 = 1;
 //   v1 = J.getInterceptor$ns(x).$add(x, v0);
 //   v2 = this;
 //   return V.Base.prototype.$add.call(null, v2, v1);
 // }"""),
 
 const TestEntry.forMethod('function(Sub#m)', """
 class Base {
-  var field;
+  var field = 123;
 }
 class Sub extends Base {
   m(x) => x + super.field;
 }
 main() {
   print(new Sub().m(10));
 }""",
 r"""
 function(x) {
-  return J.getInterceptor$ns(x).$add(x, this.field);
+  return x + this.field;
 }"""),
 
 
 ];
 
 void main() {
   runTests(tests);
 }