Test ResolutionImpact equivalence.

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

 // Copyright (c) 2015, 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.
 
 library dart2js.serialization.impact;
 
 import '../dart_types.dart';
 import '../common/resolution.dart';
 import '../constants/expressions.dart';
 import '../elements/elements.dart';
@@ skipping 171 matching lines @@
         ObjectDecoder useDecoder = listLiteralDecoder.getObject(i);
         DartType type = useDecoder.getType(Key.TYPE);
         bool isConstant = useDecoder.getBool(Key.IS_CONST);
         bool isEmpty = useDecoder.getBool(Key.IS_EMPTY);
         listLiterals.add(new ListLiteralUse(
             type, isConstant: isConstant, isEmpty: isEmpty));
       }
     }
 
     ListDecoder mapLiteralDecoder =
-        objectDecoder.getList(Key.LISTS, isOptional: true);
+        objectDecoder.getList(Key.MAPS, isOptional: true);
     List<MapLiteralUse> mapLiterals = const <MapLiteralUse>[];
-    if (listLiteralDecoder != null) {
+    if (mapLiteralDecoder != null) {
       mapLiterals = <MapLiteralUse>[];
       for (int i = 0; i < mapLiteralDecoder.length; i++) {
         ObjectDecoder useDecoder = mapLiteralDecoder.getObject(i);
         DartType type = useDecoder.getType(Key.TYPE);
         bool isConstant = useDecoder.getBool(Key.IS_CONST);
         bool isEmpty = useDecoder.getBool(Key.IS_EMPTY);
         mapLiterals.add(new MapLiteralUse(
             type, isConstant: isConstant, isEmpty: isEmpty));
       }
     }
 
     return new DeserializedResolutionImpact(
         constSymbolNames: constSymbolNames,
         constantLiterals: constantLiterals,
         dynamicUses: dynamicUses,
         features: features,
         listLiterals: listLiterals,
         mapLiterals: mapLiterals,
         staticUses: staticUses,
         typeUses: typeUses);
   }
 }