Fixes for context_manager_test on Windows.

pkg/analysis_server/test/context_manager_test.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 test.context.directory.manager;
 
 import 'dart:collection';
 
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 2641 matching lines @@
       EmbedderYamlLocator embedderYamlLocator =
           disposition.getEmbedderLocator(resourceProvider);
       EmbedderSdk sdk = new EmbedderSdk(embedderYamlLocator.embedderYamls);
       if (sdk.libraryMap.size() > 0) {
         // We have some embedder dart: uri mappings, add the resolver
         // to the list.
         resolvers.add(new DartUriResolver(sdk));
       }
     }
     resolvers.addAll(disposition.createPackageUriResolvers(resourceProvider));
-    resolvers.add(new ResourceUriResolver(PhysicalResourceProvider.INSTANCE));
+    resolvers.add(new ResourceUriResolver(resourceProvider));
     currentContext.analysisOptions = options;
     currentContext.sourceFactory =
         new SourceFactory(resolvers, disposition.packages);
     return currentContext;
   }
 
   @override
   void applyChangesToContext(Folder contextFolder, ChangeSet changeSet) {
     Map<String, int> filePaths = currentContextFilePaths[contextFolder.path];
     Set<Source> sources = currentContextSources[contextFolder.path];
@@ skipping 74 matching lines @@
 class TestUriResolver extends UriResolver {
   Map<Uri, Source> uriMap;
 
   TestUriResolver(this.uriMap);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     return uriMap[uri];
   }
 }