closure conversion: Support closures in initializers

pkg/kernel/testcases/closures/closure_in_constructor.dart

Index: pkg/kernel/testcases/closures/closure_in_constructor.dart
diff --git a/pkg/kernel/testcases/closures/closure_in_constructor.dart b/pkg/kernel/testcases/closures/closure_in_constructor.dart
new file mode 100644
index 0000000000000000000000000000000000000000..e864ed4ec19f1389abb992e1b52e712ecfdafd72
--- /dev/null
+++ b/pkg/kernel/testcases/closures/closure_in_constructor.dart
@@ -0,0 +1,20 @@
+// Copyright (c) 2017, 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.md file.
+
+class C1 {
+  var x;
+  C1(y) : x = (() => print('Hello $y'));
+}
+
+class C2 {
+  var x;
+  C2(y) {
+    x = () => print('Hello $y');
+  }
+}
+
+main() {
+  new C1('hest').x();
+  new C2('naebdyr').x();
+}