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

tests/lib_2/mirrors/delegate_function_invocation_test.dart

Index: tests/lib_2/mirrors/delegate_function_invocation_test.dart
diff --git a/tests/lib_strong/mirrors/delegate_function_invocation_test.dart b/tests/lib_2/mirrors/delegate_function_invocation_test.dart
similarity index 85%
rename from tests/lib_strong/mirrors/delegate_function_invocation_test.dart
rename to tests/lib_2/mirrors/delegate_function_invocation_test.dart
index d7398ad968ff16ae5753df2875750cad6103c31a..5fe88f4bfb1576826ba8db944a9f70e58bf6ae37 100644
--- a/tests/lib_strong/mirrors/delegate_function_invocation_test.dart
+++ b/tests/lib_2/mirrors/delegate_function_invocation_test.dart
@@ -15,7 +15,7 @@ class Proxy {
 }
 
 testClosure() {
-  var proxy = new Proxy(() => 42);
+  dynamic proxy = new Proxy(() => 42);
   Expect.equals(42, proxy());
   Expect.equals(42, proxy.call());
 }
@@ -25,7 +25,7 @@ class FakeFunction {
 }
 
 testFakeFunction() {
-  var proxy = new Proxy(new FakeFunction());
+  dynamic proxy = new Proxy(new FakeFunction());
   Expect.equals(43, proxy());
   Expect.equals(43, proxy.call());
 }
@@ -33,7 +33,7 @@ testFakeFunction() {
 topLevelFunction() => 44;
 
 testTopLevelTearOff() {
-  var proxy = new Proxy(topLevelFunction);
+  dynamic proxy = new Proxy(topLevelFunction);
   Expect.equals(44, proxy());
   Expect.equals(44, proxy.call());
 }
@@ -43,7 +43,7 @@ class C {
 }
 
 testInstanceTearOff() {
-  var proxy = new Proxy(new C().method);
+  dynamic proxy = new Proxy(new C().method);
   Expect.equals(45, proxy());
   Expect.equals(45, proxy.call());
 }