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

utils/pub/http.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.
 
 /// Helpers for dealing with HTTP.
 library pub.http;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:json' as json;
 
-// TODO(nweiz): Make this import better.
-import '../../pkg/http/lib/http.dart' as http;
+import 'package:http/http.dart' as http;
+
 import 'io.dart';
 import 'log.dart' as log;
 import 'oauth2.dart' as oauth2;
 import 'utils.dart';
 
 // TODO(nweiz): make this configurable
 /// The amount of time in milliseconds to allow HTTP requests before assuming
 /// they've failed.
 final HTTP_TIMEOUT = 30 * 1000;
 
@@ skipping 169 matching lines @@
 
 /// Exception thrown when an HTTP operation fails.
 class PubHttpException implements Exception {
   final http.Response response;
 
   const PubHttpException(this.response);
 
   String toString() => 'HTTP error ${response.statusCode}: '
       '${response.reasonPhrase}';
 }