Added back helper file accidentally deleted during test block 219 migration.

tests/lib_2/mirrors/delegate_call_through_getter_test.dart

 // Copyright (c) 2013, 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 test.invoke_call_through_getter;
 
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 
@@ skipping 11 matching lines @@
   get closure => (x, y) => '2 $this $x $y';
   get closureOpt => (x, y, [z, w]) => '3 $this $x $y $z $w';
   get closureNamed => (x, y, {z, w}) => '4 $this $x $y $z $w';
   get notAClosure => 'Not a closure';
   noSuchMethod(msg) => 'DNU';
 
   toString() => 'C';
 }
 
 class Forwarder {
-  noSuchMethod(msg) => reflect(new C()).delegate(msg);
+  dynamic noSuchMethod(Invocation msg) => reflect(new C()).delegate(msg);
 }
 
 main() {
-  var f = new Forwarder();
+  dynamic f = new Forwarder();
 
   Expect.equals('1 5 6', f.fakeFunctionCall(5, 6));
   Expect.equals('7, 8', f.fakeFunctionNSM(7, 8));
   Expect.equals('2 C 9 10', f.closure(9, 10));
   Expect.equals('3 C 11 12 13 null', f.closureOpt(11, 12, 13));
   Expect.equals('4 C 14 15 null 16', f.closureNamed(14, 15, w: 16));
   Expect.equals('DNU', f.doesNotExist(17, 18));
   Expect.throws(() => f.closure('wrong arity'), (e) => e is NoSuchMethodError);
   Expect.throws(() => f.notAClosure(), (e) => e is NoSuchMethodError);
 }