fix toString calls on Type objects in smoke

pkg/smoke/test/common.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.
 
 /// Common test code that is run by 3 tests: mirrors_test.dart,
 /// mirrors_used_test.dart, and static_test.dart.
 library smoke.test.common;
 
 import 'package:smoke/smoke.dart' as smoke;
 import 'package:unittest/unittest.dart';
@@ skipping 284 matching lines @@
     });
 
     test('symbol to name', () {
       expect(smoke.symbolToName(#i), 'i');
     });
 
     test('name to symbol', () {
       expect(smoke.nameToSymbol('i'), #i);
     });
   });
+
+  test('invoke Type instance methods', () {
+    var a = new A();
+    expect(smoke.invoke(a.runtimeType, #toString, []), 'A');
+  });
 }
 
 class A {
   int i = 42;
   int j = 44;
   int get j2 => j;
   void set j2(int v) { j = v; }
   void inc0() { i++; }
   void inc1(int v) { i = i + (v == null ? -10 : v); }
   void inc2([int v]) { i = i + (v == null ? -10 : v); }
 
   static int staticValue = 42;
   static void staticInc() { staticValue++; }
-
 }
 
 class B {
   final int f = 3;
   int _w;
   int get w => _w;
   set w(int v) { _w = v; }
 
   String z;
   A a;
@@ skipping 59 matching lines @@
   @a1 int f;
   @a1 int g;
   @a2 int h;
   @a3 int i;
 }
 
 class K {
   @AnnotC(named: true) int k;
   @AnnotC() int k2;
 }