Migrate test block 113 to Dart 2.0.

tests/language_2/generic_closure_test.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.
+// Dart test program for constructors and initializers.
+
+// Check that generic closures are properly instantiated.
+
+import 'package:expect/expect.dart';
+
+typedef T F<T>(T x);
+typedef R G<T, R>(T x);
+
+class C<T> {
+  get f => (T x) => x;
+  T g(T x) => x;
+}
+
+main() {
+  {
+    var c = new C<int>();
+    var f = c.f;
+    var g = c.g;
+    Expect.equals("(int) -> int", f.runtimeType.toString()); //# 01: ok
+    Expect.equals("(Object) -> int", g.runtimeType.toString()); //# 01: ok
+    Expect.equals(21, f(21));
+    Expect.equals(14, g(14));
+    Expect.isTrue(f is Function);
+    Expect.isTrue(g is Function);
+    Expect.isTrue(f is F);
+    Expect.isTrue(g is F);
+    Expect.isTrue(f is F<int>);
+    Expect.isTrue(g is F<int>);
+    Expect.isTrue(f is! F<bool>);
+    Expect.isTrue(g is! F<bool>);
+    Expect.isTrue(f is G<int, int>);
+    Expect.isTrue(g is G<int, int>);
+    Expect.isTrue(f is! G<int, bool>);
+    Expect.isTrue(g is! G<int, bool>);
+    Expect.isTrue(f is! G<Object,int>);
+    Expect.isTrue(g is G<Object, int>);
+  }
+
+  {
+    var c = new C<bool>();
+    var f = c.f;
+    var g = c.g;
+    Expect.equals("(bool) -> bool", f.runtimeType.toString()); //# 01: ok
+    Expect.equals("(Object) -> bool", g.runtimeType.toString()); //# 01: ok
+    Expect.isTrue(f is F);
+    Expect.isTrue(g is F);
+    Expect.isTrue(f is! F<int>);
+    Expect.isTrue(g is! F<int>);
+    Expect.isTrue(f is F<bool>);
+    Expect.isTrue(g is F<bool>);
+  }
+
+  {
+    var c = new C();
+    var f = c.f;
+    var g = c.g;
+    Expect.equals("(dynamic) -> dynamic", f.runtimeType.toString()); //# 01: ok
+    Expect.equals("(Object) -> dynamic", g.runtimeType.toString()); //# 01: ok
+    Expect.isTrue(f is F);
+    Expect.isTrue(g is F);
+    Expect.isTrue(f is! F<int>);
+    Expect.isTrue(g is! F<int>);
+    Expect.isTrue(f is! F<bool>);
+    Expect.isTrue(g is! F<bool>);
+  }
+}