Refactor CompilerOutput

pkg/compiler/lib/src/serialization/task.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.task;
 
-import 'dart:async' show EventSink, Future;
+import 'dart:async' show Future;
 
+import '../../compiler_new.dart';
 import '../common/resolution.dart' show ResolutionImpact, ResolutionWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
 import '../universe/world_impact.dart' show WorldImpact;
 import 'json_serializer.dart';
 import 'serialization.dart';
 import 'system.dart';
 
 /// A deserializer that can load a library element by reading it's information
@@ skipping 79 matching lines @@
       serializer.plugins.add(new ResolvedAstSerializerPlugin(
           compiler.resolution, backendSerializer));
 
       for (LibraryElement library in libraries) {
         serializer.serialize(library);
       }
       return serializer;
     });
   }
 
-  void serializeToSink(
-      EventSink<String> sink, Iterable<LibraryElement> libraries) {
+  void serializeToSink(OutputSink sink, Iterable<LibraryElement> libraries) {
     measure(() {
       sink
         ..add(createSerializer(libraries)
             .toText(const JsonSerializationEncoder()))
         ..close();
     });
   }
 
   void deserializeFromText(Uri sourceUri, String serializedData) {
     measure(() {
@@ skipping 30 matching lines @@
 /// elements.
 abstract class DeserializerSystem {
   Future<LibraryElement> readLibrary(Uri resolvedUri);
   bool isDeserialized(Element element);
   bool hasResolvedAst(ExecutableElement element);
   ResolvedAst getResolvedAst(ExecutableElement element);
   bool hasResolutionImpact(Element element);
   ResolutionImpact getResolutionImpact(Element element);
   WorldImpact computeWorldImpact(Element element);
 }