Breaking changes in 'analyzer' package.

pkg/analyzer/lib/file_system/file_system.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.
 
 library file_system;
 
 import 'dart:async';
 
 import 'package:analyzer/src/generated/source.dart';
 import 'package:path/path.dart';
 import 'package:watcher/watcher.dart';
 
 
 /**
  * [File]s are leaf [Resource]s which contain data.
  */
 abstract class File extends Resource {
   /**
    * Create a new [Source] instance that serves this file.
    */
-  Source createSource(UriKind uriKind);
+  Source createSource([Uri uri]);
 }
 
 
 /**
  * [Folder]s are [Resource]s which may contain files and/or other folders.
  */
 abstract class Folder extends Resource {
   /**
    * Watch for changes to the files inside this folder (and in any nested
    * folders, including folders reachable via links).
@@ skipping 76 matching lines @@
   /**
    * The name of the `file` scheme.
    */
   static String _FILE_SCHEME = "file";
 
   final ResourceProvider _provider;
 
   ResourceUriResolver(this._provider);
 
   @override
-  Source fromEncoding(UriKind kind, Uri uri) {
-    if (kind == UriKind.FILE_URI) {
-      Resource resource = _provider.getResource(uri.path);
-      if (resource is File) {
-        return resource.createSource(kind);
-      }
-    }
-    return null;
-  }
-
-  @override
   Source resolveAbsolute(Uri uri) {
     if (!_isFileUri(uri)) {
       return null;
     }
     Resource resource = _provider.getResource(uri.path);
     if (resource is File) {
-      return resource.createSource(UriKind.FILE_URI);
+      return resource.createSource(uri);
     }
     return null;
   }
 
   /**
    * Return `true` if the given URI is a `file` URI.
    *
    * @param uri the URI being tested
    * @return `true` if the given URI is a `file` URI
    */
   static bool _isFileUri(Uri uri) => uri.scheme == _FILE_SCHEME;
 }