| Index: pkg/compiler/lib/src/helpers/helpers.dart | 
| diff --git a/pkg/compiler/lib/src/helpers/helpers.dart b/pkg/compiler/lib/src/helpers/helpers.dart | 
| index 544d5c681ff9f60c0c911edb4ec01796a8cdff95..3941373491a8f95d932de6840b0f8249d6a02bed 100644 | 
| --- a/pkg/compiler/lib/src/helpers/helpers.dart | 
| +++ b/pkg/compiler/lib/src/helpers/helpers.dart | 
| @@ -7,13 +7,20 @@ | 
|  | 
| library dart2js.helpers; | 
|  | 
| -import 'dart:async' show EventSink; | 
| +import 'dart:async' show | 
| +    EventSink; | 
| import 'dart:collection'; | 
| import 'dart:convert'; | 
|  | 
| import '../../compiler.dart'; | 
| -import '../dart2jslib.dart'; | 
| -import '../messages.dart' show MessageKind; | 
| +import '../compiler.dart' show | 
| +    Compiler; | 
| +import '../diagnostics/invariant.dart' show | 
| +    DEBUG_MODE; | 
| +import '../diagnostics/spannable.dart' show | 
| +    Spannable; | 
| +import '../messages.dart' show | 
| +    MessageKind; | 
| import '../util/util.dart'; | 
|  | 
| part 'debug_collection.dart'; | 
|  |