Fix annotation of promoted parameters in Fasta inference tests.

pkg/front_end/testcases/inference/future_union_async_conditional.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;
 
 import 'dart:async';
 
 class MyFuture<T> implements Future<T> {
   MyFuture() {}
   MyFuture.value(x) {}
   dynamic noSuchMethod(invocation);
   MyFuture<S> then<S>(FutureOr<S> f(T x), {Function onError}) => null;
 }
 
 Future<int> g1(bool x) async {
-  return /*info:DOWN_CAST_COMPOSITE*/ x
+  return /*info:DOWN_CAST_COMPOSITE*/ /*@promotedType=none*/ x
       ? 42
       : new /*@typeArgs=int*/ Future.value(42);
 }
 
 Future<int> g2(bool x) async =>
-    /*info:DOWN_CAST_COMPOSITE*/ x
+    /*info:DOWN_CAST_COMPOSITE*/ /*@promotedType=none*/ x
         ? 42
         : new /*@typeArgs=int*/ Future.value(42);
 Future<int> g3(bool x) async {
-  var /*@type=Object*/ y = x ? 42 : new /*@typeArgs=dynamic*/ Future.value(42);
+  var /*@type=Object*/ y = /*@promotedType=none*/ x
+      ? 42
+      : new /*@typeArgs=dynamic*/ Future.value(42);
   return /*info:DOWN_CAST_COMPOSITE*/ /*@promotedType=none*/ y;
 }