Restore AnalysisDeltaTest in Dart.

pkg/analyzer/lib/src/generated/engine.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 engine;
 
 import 'dart:collection';
@@ skipping 5880 matching lines @@
    */
   HashMap<Source, AnalysisLevel> _analysisMap = new HashMap<Source, AnalysisLevel>();
 
   /**
    * Return a collection of the sources that have been added. This is equivalent to calling
    * [getAnalysisLevels] and collecting all sources that do not have an analysis level of
    * [AnalysisLevel.NONE].
    *
    * @return a collection of the sources
    */
-  Iterable<Source> get addedSources {
+  List<Source> get addedSources {
     List<Source> result = new List<Source>();
-    for (MapEntry<Source, AnalysisLevel> entry in getMapEntrySet(_analysisMap)) {
-      if (entry.getValue() != AnalysisLevel.NONE) {
-        result.add(entry.getKey());
+    _analysisMap.forEach((Source source, AnalysisLevel level) {
+      if (level != AnalysisLevel.NONE) {
+        result.add(source);
       }
-    }
+    });
     return result;
   }
 
   /**
    * Return a mapping of sources to the level of analysis that should be performed.
    *
    * @return the analysis map
    */
   Map<Source, AnalysisLevel> get analysisLevels => _analysisMap;
 
@@ skipping 9236 matching lines @@
     _index++;
     if (_index >= _manager._workQueues[_queueIndex].length) {
       _index = 0;
       _queueIndex++;
       while (_queueIndex < _manager._workQueues.length && _manager._workQueues[_queueIndex].isEmpty) {
         _queueIndex++;
       }
     }
   }
 }