Prioritize analysis of files that import the changed file, or have an error or warning.

pkg/analyzer/lib/src/dart/analysis/file_state.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/error/listener.dart';
@@ skipping 98 matching lines @@
   List<FileState> _partedFiles;
   List<NameFilter> _exportFilters;
 
   Set<FileState> _directReferencedFiles = new Set<FileState>();
   Set<FileState> _transitiveFiles;
   String _transitiveSignature;
 
   Map<String, TopLevelDeclaration> _topLevelDeclarations;
   Map<String, TopLevelDeclaration> _exportedTopLevelDeclarations;
 
+  /**
+   * The flag that shows whether the file has an error or warning that
+   * might be fixed by a change to another file.
+   */
+  bool hasErrorOrWarning = false;
+
   FileState._(this._fsState, this.path, this.uri, this.source);
 
   /**
    * The unlinked API signature of the file.
    */
   List<int> get apiSignature => _apiSignature;
 
   /**
    * The content of the file.
    */
@@ skipping 687 matching lines @@
   _FastaElementProxy operator [](fasta.Builder builder) =>
       _elements.putIfAbsent(builder, () => new _FastaElementProxy());
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 class _FastaInterfaceTypeProxy implements fasta.KernelInterfaceType {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }