Make Change implementation consistent with the server spec.

pkg/analysis_services/lib/src/correction/source_buffer.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library services.src.correction.source_buffer;
 
 import 'package:analysis_services/correction/change.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 
 /**
  * Helper for building Dart source with linked positions.
  */
 class SourceBuilder {
   final String file;
   final int offset;
   final StringBuffer _buffer = new StringBuffer();
 
-  final List<LinkedPositionGroup> linkedPositionGroups = <LinkedPositionGroup>[
+  final List<LinkedEditGroup> linkedPositionGroups = <LinkedEditGroup>[
       ];
-  LinkedPositionGroup _currentLinkedPositionGroup;
+  LinkedEditGroup _currentLinkedPositionGroup;
   int _currentPositionStart;
 
   SourceBuilder(this.file, this.offset);
 
   SourceBuilder.buffer() : file = null, offset = 0;
 
   int get length => _buffer.length;
 
-  void addProposal(String proposal) {
-    _currentLinkedPositionGroup.addProposal(proposal);
+  void addSuggestion(LinkedEditSuggestionKind kind, String value) {
+    var suggestion = new LinkedEditSuggestion(kind, value);
+    _currentLinkedPositionGroup.addSuggestion(suggestion);
   }
 
-  void addProposals(List<String> proposals) {
-    proposals.forEach((proposal) => addProposal(proposal));
+  void addSuggestions(LinkedEditSuggestionKind kind, List<String> values) {
+    values.forEach((value) => addSuggestion(kind, value));
   }
 
   /**
    * Appends [s] to the buffer.
    */
   SourceBuilder append(String s) {
     _buffer.write(s);
     return this;
   }
 
   /**
    * Ends position started using [startPosition].
    */
   void endPosition() {
     assert(_currentLinkedPositionGroup != null);
     _addPosition();
     _currentLinkedPositionGroup = null;
   }
 
   /**
    * Marks start of a new linked position for the group with the given ID.
    */
   void startPosition(String groupId) {
     assert(_currentLinkedPositionGroup == null);
-    for (LinkedPositionGroup position in linkedPositionGroups) {
+    for (LinkedEditGroup position in linkedPositionGroups) {
       if (position.id == groupId) {
         _currentLinkedPositionGroup = position;
         break;
       }
     }
     if (_currentLinkedPositionGroup == null) {
-      _currentLinkedPositionGroup = new LinkedPositionGroup(groupId);
+      _currentLinkedPositionGroup = new LinkedEditGroup(groupId);
       linkedPositionGroups.add(_currentLinkedPositionGroup);
     }
     _currentPositionStart = _buffer.length;
   }
 
   @override
   String toString() => _buffer.toString();
 
   /**
    * Adds position location [SourceRange] using current fields.
    */
   void _addPosition() {
     int start = offset + _currentPositionStart;
     int end = offset + _buffer.length;
-    Position position = new Position(file, start, end - start);
-    _currentLinkedPositionGroup.addPosition(position);
+    int length = end - start;
+    Position position = new Position(file, start);
+    _currentLinkedPositionGroup.addPosition(position, length);
   }
 }