Generated front_end/testcases/inference test files from Analyzer tests.

pkg/front_end/testcases/inference/constructors_downwards_with_constraint.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.
+
+/*@testedFeatures=inference*/
+library test;
+
+class A {}
+
+class B extends A {}
+
+class Foo<T extends A> {}
+
+void main() {
+  Foo<B> foo = /*@typeArgs=B*/ new Foo();
+}