Don't report removed sources as changed in CacheConsistencyValidatorImpl.

pkg/analyzer/lib/src/context/cache.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 analyzer.src.context.cache;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 679 matching lines @@
               if (data != null) {
                 data.dependentResults.remove(thisResult);
               }
             }
           }
         }
       }
 //      if (deltaResult == null) {
 //        String indent = '  ' * level;
 //        print('[$id]$indent invalidate $descriptor for $target');
-//        if ('$descriptor for $target' ==
-//            'READY_LIBRARY_ELEMENT2 for /Users/scheglov/tmp/limited-invalidation/async/lib/async.dart') {
-//          print('interesting');
-//        }
 //      }
     }
     // Invalidate results that depend on this result.
     _invalidateDependentResults(id, thisData, delta, level + 1);
     // If empty and not explicitly added, remove the entry altogether.
     if (_resultMap.isEmpty && !explicitlyAdded) {
       CacheEntry entry = _partition.entryMap.remove(target);
       if (entry != null) {
         entry.dispose();
       }
@@ skipping 789 matching lines @@
   void resultAccessed(TargetedResult result) {}
 
   @override
   List<TargetedResult> resultStored(TargetedResult newResult, newValue) {
     return TargetedResult.EMPTY_LIST;
   }
 
   @override
   void targetRemoved(AnalysisTarget target) {}
 }