MemoryResourceProvider always uses the current platform

pkg/analyzer/lib/file_system/memory_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 analyzer.file_system.memory_file_system;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:core';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/source/source_resource.dart';
 import 'package:analyzer/src/util/absolute_path.dart';
-import 'package:path/path.dart';
+import 'package:path/path.dart' as pathos;
 import 'package:watcher/watcher.dart';
 
 /**
  * An in-memory implementation of [ResourceProvider].
  * Use `/` as a path separator.
  */
 class MemoryResourceProvider implements ResourceProvider {
   final Map<String, _MemoryResource> _pathToResource =
       new HashMap<String, _MemoryResource>();
   final Map<String, List<int>> _pathToBytes = new HashMap<String, List<int>>();
   final Map<String, int> _pathToTimestamp = new HashMap<String, int>();
   final Map<String, List<StreamController<WatchEvent>>> _pathToWatchers =
       new HashMap<String, List<StreamController<WatchEvent>>>();
   int nextStamp = 0;
 
-  final Context _pathContext;
+  final pathos.Context _pathContext;
 
   @override
   final AbsolutePathContext absolutePathContext;
 
-  MemoryResourceProvider({bool isWindows: false})
-      : _pathContext = isWindows ? windows : posix,
-        absolutePathContext = new AbsolutePathContext(isWindows);
+  MemoryResourceProvider({pathos.Context context})
+      : _pathContext = context ?? pathos.context,
+        absolutePathContext = new AbsolutePathContext(
+            pathos.Style.platform == pathos.Style.windows);
 
   @override
-  Context get pathContext => _pathContext;
+  pathos.Context get pathContext => _pathContext;
 
   /**
    * Delete the file with the given path.
    */
   void deleteFile(String path) {
     _checkFileAtPath(path);
     _pathToResource.remove(path);
     _pathToBytes.remove(path);
     _pathToTimestamp.remove(path);
     _notifyWatchers(path, ChangeType.REMOVE);
@@ skipping 264 matching lines @@
   File renameSync(String newPath) {
     throw new FileSystemException(path, 'File could not be renamed');
   }
 
   @override
   File resolveSymbolicLinksSync() {
     return throw new FileSystemException(path, "File does not exist");
   }
 
   @override
-  Uri toUri() => new Uri.file(path, windows: _provider.pathContext == windows);
+  Uri toUri() =>
+      new Uri.file(path, windows: _provider.pathContext == pathos.windows);
 
   @override
   void writeAsBytesSync(List<int> bytes) {
     throw new FileSystemException(path, 'File could not be written');
   }
 
   @override
   void writeAsStringSync(String content) {
     throw new FileSystemException(path, 'File could not be written');
   }
@@ skipping 54 matching lines @@
 
   @override
   File renameSync(String newPath) {
     return _provider.renameFileSync(this, newPath);
   }
 
   @override
   File resolveSymbolicLinksSync() => this;
 
   @override
-  Uri toUri() => new Uri.file(path, windows: _provider.pathContext == windows);
+  Uri toUri() =>
+      new Uri.file(path, windows: _provider.pathContext == pathos.windows);
 
   @override
   void writeAsBytesSync(List<int> bytes) {
     _provider._setFileContent(this, bytes);
   }
 
   @override
   void writeAsStringSync(String content) {
     _provider._setFileContent(this, UTF8.encode(content));
   }
@@ skipping 77 matching lines @@
       return true;
     }
     return contains(path);
   }
 
   @override
   Folder resolveSymbolicLinksSync() => this;
 
   @override
   Uri toUri() =>
-      new Uri.directory(path, windows: _provider.pathContext == windows);
+      new Uri.directory(path, windows: _provider.pathContext == pathos.windows);
 }
 
 /**
  * An in-memory implementation of [Resource].
  */
 abstract class _MemoryResource implements Resource {
   final MemoryResourceProvider _provider;
   @override
   final String path;
 
@@ skipping 34 matching lines @@
   bool operator ==(other) {
     if (runtimeType != other.runtimeType) {
       return false;
     }
     return path == other.path;
   }
 
   @override
   String toString() => path;
 }