Test closed world model after deserialization.

pkg/compiler/lib/src/serialization/equivalence.dart

 // Copyright (c) 2016, 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.
 
 /// Functions for asserting equivalence across serialization.
 
 library dart2js.serialization.equivalence;
 
 import '../common/resolution.dart';
 import '../constants/expressions.dart';
@@ skipping 21 matching lines @@
   }
   return true;
 }
 
 /// Returns `true` if the elements in [a] and [b] are equivalent as sets using
 /// [elementEquivalence] to determine element equivalence.
 bool areSetsEquivalent(
     Iterable set1,
     Iterable set2,
     [bool elementEquivalence(a, b) = equality]) {
-
   Set remaining = set2.toSet();
   for (var element1 in set1) {
     bool found = false;
     for (var element2 in set2) {
       if (elementEquivalence(element1, element2)) {
         found = true;
         remaining.remove(element2);
         break;
       }
     }
@@ skipping 639 matching lines @@
           areMapLiteralUsesEquivalent) &&
       strategy.testSets(
           impact1, impact2, 'staticUses',
           impact1.staticUses, impact2.staticUses,
           areStaticUsesEquivalent) &&
       strategy.testSets(
           impact1, impact2, 'typeUses',
           impact1.typeUses, impact2.typeUses,
           areTypeUsesEquivalent);
 }