Provide direction to users of the now deprecated class FileUriResolver

pkg/analyzer/test/generated/source_factory_test.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.test.generated.test.generated.source_factory;
 
 import 'dart:convert';
 
 import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisEngine, Logger;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine_io.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart' as utils;
 import 'package:package_config/packages.dart';
@@ skipping 13 matching lines @@
 }
 
 Source createSource({String path, String uri}) =>
     //TODO(pquitslund): find some way to pass an actual URI into source creation
     new MemoryResourceProvider()
         .getFile(path)
         .createSource(uri != null ? Uri.parse(uri) : null);
 
 void runPackageMapTests() {
   final Uri baseUri = new Uri.file('test/base');
-  final List<UriResolver> testResolvers = [new FileUriResolver()];
+  final List<UriResolver> testResolvers = [
+    new ResourceUriResolver(PhysicalResourceProvider.INSTANCE)
+  ];
 
   Packages createPackageMap(Uri base, String configFileContents) {
     List<int> bytes = UTF8.encode(configFileContents);
     Map<String, Uri> map = pkgfile.parse(bytes, base);
     return new MapPackages(map);
   }
 
   Map<String, List<Folder>> getPackageMap(String config) {
     Packages packages = createPackageMap(baseUri, config);
     SourceFactory factory = new SourceFactory(testResolvers, packages);
@@ skipping 303 matching lines @@
   UriResolver_SourceFactoryTest_test_fromEncoding_valid(this.encoding);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     if (uri.toString() == encoding) {
       return new TestSource();
     }
     return null;
   }
 }