Migrate test block 113 to Dart 2.0.

tests/language_2/generic_field_mixin6_test.dart

Index: tests/language_2/generic_field_mixin6_test.dart
diff --git a/tests/language/generic_field_mixin5_test.dart b/tests/language_2/generic_field_mixin6_test.dart
similarity index 60%
rename from tests/language/generic_field_mixin5_test.dart
rename to tests/language_2/generic_field_mixin6_test.dart
index 26b7e4077f772e98f1cbe953faba01971380a296..1435d408d2064e7ef435c97505fb94becda024c1 100644
--- a/tests/language/generic_field_mixin5_test.dart
+++ b/tests/language_2/generic_field_mixin6_test.dart
@@ -7,9 +7,8 @@
 import 'package:expect/expect.dart';
 
 class M<T> {
-  var field = () {
-    return T;
-  }();
+  T field1 = 0; //# 01: compile-time error
+  T field2 = 0 as dynamic;
 }
 
 class A<U> {}
@@ -19,10 +18,15 @@ class C2 = Object with M<int>;
 class C3 = Object with M<String>;
 
 main() {
-  Expect.equals(int, new C1<int>().field);
-  Expect.equals(String, new C1<String>().field);
-
-  Expect.equals(int, new C2().field);
-
-  Expect.equals(String, new C3().field);
+  // no error: 0 is an int
+  new C1<int>();
+  new C2();
+
+  // type error: 0 is not a string
+  Expect.throws(() {
+    new C1<String>();
+  }, (e) => e is TypeError);
+  Expect.throws(() {
+    new C3();
+  }, (e) => e is TypeError);
 }