Dynamic -> dynamic.

tests/html/postmessage_structured_test.dart

 // Copyright (c) 2012, 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
 
 library postmessage_js_test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:html';
 import 'dart:collection';  // SplayTreeMap
 import 'utils.dart';
@@ skipping 102 matching lines @@
           window.postMessage({'recipient': 'JS', 'data': value}, '*');
         });
 
   var obj1 = {'a': 100, 'b': 's'};
   var obj2 = {'x': obj1, 'y': obj1};  // DAG.
 
   var obj3 = {};
   obj3['a'] = 100;
   obj3['b'] = obj3;  // Cycle.
 
-  var obj4 = new SplayTreeMap<String, Dynamic>();  // Different implementation.
+  var obj4 = new SplayTreeMap<String, dynamic>();  // Different implementation.
   obj4['a'] = 100;
   obj4['b'] = 's';
 
   var cyclic_list = [1, 2, 3];
   cyclic_list[1] = cyclic_list;
 
   go('test_simple_list', [1, 2, 3]);
   go('test_map', obj1);
   go('test_DAG', obj2);
   go('test_cycle', obj3);
   go('test_simple_splay', obj4);
   go('const_array_1', const [const [1], const [2]]);
   go('const_array_dag', const [const [1], const [1]]);
   go('array_deferred_copy', [1,2,3, obj3, obj3, 6]);
   go('array_deferred_copy_2', [1,2,3, [4, 5, obj3], [obj3, 6]]);
   go('cyclic_list', cyclic_list);
 }