Fix closure conversion in field and local initializers.

pkg/kernel/testcases/closures_initializers/local_initializers.dart

 // 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 file.
 
 // The purpose of this test is to detect that closures in [LocalInitializer]s
 // are properly converted.  This test assumes that
 // [ArgumentExtractionForRedirecting] transformer was run before closure
 // conversion.  It should introduce one [LocalInitializer] for each argument
 // passed to the redirecting constructor.  If such argument contains a closure,
 // it would appear in a [LocalInitializer].
 
 class X {}
 
+// Closure in field initializer.

[Dmitry Stefantsov, 2017/07/07 09:47:47]

I would split this test in two or change the name of the test file (and the
description above in the comment).

+//
 class A {
   X foo;
-  A.named(X foo) {}
-  A(X foo) : this.named((() => foo)());
+  A(X i) : foo = ((() => i)());
+}
+
+// Closure in local initializer.
+//
+class B {
+  X foo;
+  B.named(X foo) {}
+  B(X foo) : this.named((() => foo)());
 }
 
 main() {
   A a = new A(new X());
   a.foo; // To prevent dartanalyzer from marking [a] as unused.
+  B b = new B(new X());
+  b.foo;
 }