Support (de)serialization from command-line

tests/compiler/dart2js/serialization/model_test.dart

Index: tests/compiler/dart2js/serialization/model_test.dart
diff --git a/tests/compiler/dart2js/serialization/model_test.dart b/tests/compiler/dart2js/serialization/model_test.dart
index e8596bbd67ab029abb275f4f48e9c2b927598ca6..1ae29d8de696b4a038c2beae2692fae8a7c4cdee 100644
--- a/tests/compiler/dart2js/serialization/model_test.dart
+++ b/tests/compiler/dart2js/serialization/model_test.dart
@@ -22,6 +22,7 @@ import 'package:compiler/src/serialization/impact_serialization.dart';
 import 'package:compiler/src/serialization/json_serializer.dart';
 import 'package:compiler/src/serialization/serialization.dart';
 import 'package:compiler/src/serialization/equivalence.dart';
+import 'package:compiler/src/serialization/system.dart';
 import 'package:compiler/src/serialization/task.dart';
 import 'package:compiler/src/tree/nodes.dart';
 import 'package:compiler/src/universe/world_impact.dart';
@@ -79,7 +80,7 @@ Future checkModels(
       memorySourceFiles: sourceFiles,
       options: [Flags.analyzeOnly]);
   compilerDeserialized.resolution.retainCachesForTesting = true;
-  deserialize(compilerDeserialized, serializedData);
+  compilerDeserialized.serialization.deserializeFromText(serializedData);
   await compilerDeserialized.run(entryPoint);
   compilerDeserialized.phase = Compiler.PHASE_DONE_RESOLVING;
   compilerDeserialized.world.populate();