Make constant lists immutable

pkg/analyzer/lib/src/generated/source.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.source;
 
 import 'dart:collection';
@@ skipping 346 matching lines @@
  * represents files on disk would typically query the file system to determine the state of the
  * file.
  *
  * If the instances that implement this API are the system of record, then they will typically be
  * unique. In that case, sources that are created that represent non-existent files must also be
  * retained so that if those files are created at a later date the long-lived sources representing
  * those files will know that they now exist.
  */
 abstract class Source {
   /**
-   * An empty array of sources.
+   * An empty list of sources.
    */
-  static final List<Source> EMPTY_ARRAY = new List<Source>(0);
+  static const List<Source> EMPTY_ARRAY = const <Source>[];
 
   /**
    * Return `true` if the given object is a source that represents the same source code as
    * this source.
    *
    * @param object the object to be compared with this object
    * @return `true` if the given object is a source that represents the same source code as
    *         this source
    * See [Object.==].
    */
@@ skipping 566 matching lines @@
 
   /**
    * Return an absolute URI that represents the given source, or `null` if a valid URI cannot
    * be computed.
    *
    * @param source the source to get URI for
    * @return the absolute URI representing the given source
    */
   Uri restoreAbsolute(Source source) => null;
 }