Use ".."-style imports in scheduled_test.

pkg/scheduled_test/lib/src/descriptor/file.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.
 
 library descriptor.file;
 
 import 'dart:async';
 import 'dart:io' as io;
 import 'dart:math' as math;
 import 'dart:utf';
 
-import 'package:pathos/path.dart' as path;
+import '../../../../../pkg/pathos/lib/path.dart' as path;
 
 import '../../descriptor.dart' as descriptor;
 import '../../scheduled_test.dart';
 import '../utils.dart';
 import 'utils.dart';
 
 /// A descriptor describing a single file.
 class File extends descriptor.Entry {
   /// Whether this descriptor describes a binary file. This is only used when
   /// displaying error messages.
@@ skipping 75 matching lines @@
         results.add('| $actualLine');
       }
     }
   }
 
   return "File $description should contain:\n"
     "${prefixLines(expected)}\n"
     "but actually contained:\n"
     "${results.join('\n')}";
 }