Support for type dynamic in VM

tests/language/factory_redirection_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.
 
 class A<T> {
   A() : x = null;
 
   const A.constant(this.x);
 
   factory A.factory() {
     return new B<Set>();
   }
 
   factory A.test01() = T;  /// 01: runtime error
 
-  factory A.test02() = Dynamic;  /// 02: runtime error
+  factory A.test02() = dynamic;  /// 02: runtime error
 
   factory A.test03() = Undefined;  /// 03: runtime error
 
   factory A.test04() = C.test04;  /// 04: compile-time error
 
   final T x;
 }
 
 class B<T> extends A<T> {
   B();
@@ skipping 36 matching lines @@
   Expect.isTrue(new A<List>() is A<List>);
   Expect.isTrue(new A<bool>.constant(true).x);
   Expect.isTrue(new A<List>.factory() is B<Set>);
   Expect.isTrue(new B<List>.A() is A<List>);
   Expect.isTrue(new B<bool>.A_constant(true).x);
   Expect.isTrue(new B<List>.A_factory() is B<Set>);
   Expect.isTrue(new C<String, num>.A() is A<num>);
   Expect.isTrue(new C<String, num>.A_factory() is B<Set>);
   Expect.isTrue(new C<String, bool>.B_constant(true).x);
 }