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

utils/pub/command_uploader.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 command_uploader;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:uri';
 
-import '../../pkg/args/lib/args.dart';
-import '../../pkg/pathos/lib/path.dart' as path;
+import 'package:args/args.dart';
+import 'package:pathos/path.dart' as path;
+
 import 'entrypoint.dart';
 import 'exit_codes.dart' as exit_codes;
 import 'http.dart';
 import 'io.dart';
 import 'log.dart' as log;
 import 'oauth2.dart' as oauth2;
 import 'pub.dart';
 import 'utils.dart';
 
 /// Handles the `uploader` pub command.
@@ skipping 51 matching lines @@
               "/uploaders/${encodeUriComponent(uploader)}.json");
           return client.delete(url);
         }
       });
     }).then(handleJsonSuccess).catchError((asyncError) {
       if (asyncError.error is! PubHttpException) throw asyncError;
       handleJsonError(asyncError.error.response);
     });
   }
 }