| Index: pkg/compiler/lib/src/serialization/task.dart
 | 
| diff --git a/pkg/compiler/lib/src/serialization/task.dart b/pkg/compiler/lib/src/serialization/task.dart
 | 
| index 95059faaa1e229f477767a04320a4c5b7c472d41..b7119ecad65352ba4f726d2cf4ed2a75e5c67506 100644
 | 
| --- a/pkg/compiler/lib/src/serialization/task.dart
 | 
| +++ b/pkg/compiler/lib/src/serialization/task.dart
 | 
| @@ -5,6 +5,7 @@
 | 
|  library dart2js.serialization.task;
 | 
|  
 | 
|  import '../common/resolution.dart' show
 | 
| +    ResolutionImpact,
 | 
|      ResolutionWorkItem;
 | 
|  import '../common/tasks.dart' show
 | 
|      CompilerTask;
 | 
| @@ -89,5 +90,6 @@ class DeserializedResolutionWorkItem implements ResolutionWorkItem {
 | 
|  abstract class DeserializerSystem {
 | 
|    LibraryElement readLibrary(Uri resolvedUri);
 | 
|    bool isDeserialized(Element element);
 | 
| +  ResolutionImpact getResolutionImpact(Element element);
 | 
|    WorldImpact computeWorldImpact(Element element);
 | 
|  }
 | 
| 
 |