Make more use of generated code in analysis server.

pkg/analysis_server/lib/src/services/correction/fix.dart

 // Copyright (c) 2014, 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 services.correction.fix;
 
-import 'package:analysis_server/src/services/correction/change.dart';
+import 'package:analysis_server/src/protocol2.dart' show SourceChange;
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 
 /**
  * Computes [Fix]s for the given [AnalysisError].
  *
  * Returns the computed [Fix]s, not `null`.
  */
 List<Fix> computeFixes(SearchEngine searchEngine, CompilationUnit unit,
     AnalysisError error) {
   Source source = unit.element.source;
   String file = source.fullName;
   var processor = new FixProcessor(searchEngine, source, file, unit, error);
   return processor.compute();
 }
 
 
 /**
  * A description of a single proposed fix for some problem.
  */
 class Fix {
   final FixKind kind;
-  final Change change;
+  final SourceChange change;
 
   Fix(this.kind, this.change);
 
   @override
   String toString() {
     return '[kind=$kind, change=$change]';
   }
 }
 
 
@@ skipping 74 matching lines @@
 
   final name;
   final int relevance;
   final String message;
 
   const FixKind(this.name, this.relevance, this.message);
 
   @override
   String toString() => name;
 }