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

tests/lib_2/mirrors/delegate_call_through_getter_test.dart

Index: tests/lib_2/mirrors/delegate_call_through_getter_test.dart
diff --git a/tests/lib_strong/mirrors/delegate_call_through_getter_test.dart b/tests/lib_2/mirrors/delegate_call_through_getter_test.dart
similarity index 92%
rename from tests/lib_strong/mirrors/delegate_call_through_getter_test.dart
rename to tests/lib_2/mirrors/delegate_call_through_getter_test.dart
index cdc84fcde26e66c4a3d598282b20a264e4b8bd2f..647c2f9a91fd892dff0fe87889ba690101dc1d21 100644
--- a/tests/lib_strong/mirrors/delegate_call_through_getter_test.dart
+++ b/tests/lib_2/mirrors/delegate_call_through_getter_test.dart
@@ -29,11 +29,11 @@ class 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));