Rename "pathos" package to "path".

sdk/lib/_internal/pub/lib/src/io.dart

 // Copyright (c) 2013, 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.
 
 /// Helper functionality to make working with IO easier.
 library pub.io;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:json';
 
-import 'package:pathos/path.dart' as path;
+import 'package:path/path.dart' as path;
 import 'package:http/http.dart' show ByteStream;
 import 'error_group.dart';
 import 'exit_codes.dart' as exit_codes;
 import 'log.dart' as log;
 import 'sdk.dart' as sdk;
 import 'utils.dart';
 
 export 'package:http/http.dart' show ByteStream;
 
 /// Returns whether or not [entry] is nested somewhere within [dir]. This just
@@ skipping 786 matching lines @@
   const PubProcessResult(this.stdout, this.stderr, this.exitCode);
 
   bool get success => exitCode == 0;
 }
 
 /// Gets a [Uri] for [uri], which can either already be one, or be a [String].
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return Uri.parse(uri);
 }