Rename "pathos" package to "path".

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

 // Copyright (c) 2012, 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 pub.entrypoint;
 
 import 'dart:async';
 
-import 'package:pathos/path.dart' as path;
+import 'package:path/path.dart' as path;
 
 import 'git.dart' as git;
 import 'io.dart';
 import 'lock_file.dart';
 import 'log.dart' as log;
 import 'package.dart';
 import 'pubspec.dart';
 import 'sdk.dart' as sdk;
 import 'system_cache.dart';
 import 'utils.dart';
@@ skipping 238 matching lines @@
         // Skip directories and broken symlinks.
         if (!fileExists(file)) return false;
 
         var relative = path.relative(file, from: beneath);
         if (_BLACKLISTED_FILES.contains(path.basename(relative))) return false;
         return !path.split(relative).any(_BLACKLISTED_DIRS.contains);
       }).toList();
     });
   }
 }