Switch pkg packages, pub, and dartdoc to use package: imports.

utils/tests/pub/descriptor/tar.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.tar;
 
 import 'dart:io';
 import 'dart:async';
 
-import '../../../../pkg/pathos/lib/path.dart' as path;
-import '../../../../pkg/scheduled_test/lib/scheduled_test.dart';
-import '../../../../pkg/scheduled_test/lib/descriptor.dart';
+import 'package:pathos/path.dart' as path;
+import 'package:scheduled_test/scheduled_test.dart';
+import 'package:scheduled_test/descriptor.dart';
 
 import '../../../pub/io.dart';
 import '../../../pub/utils.dart';
 
 /// Describes a tar file and its contents.
 class TarFileDescriptor extends DirectoryDescriptor {
   TarFileDescriptor(String name, List<Descriptor> contents)
       : super(name, contents);
 
   /// Creates the files and directories within this tar file, then archives
@@ skipping 21 matching lines @@
     throw "TODO(nweiz): implement this";
   }
 
   Stream<List<int>> read() {
     return new Stream<List<int>>.fromFuture(withTempDir((tempDir) {
       return create(tempDir).then((_) =>
           readBinaryFile(path.join(tempDir, name)));
     }));
   }
 }