Regenerate pub sources.

sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart

Index: sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart
diff --git a/sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart b/sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart
index 14b0646a16560600398d26175843617068ab492c..9996ab9d1fa690e7995eba1f49b6a42c279b8926 100644
--- a/sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart
+++ b/sdk/lib/_internal/pub_generated/lib/src/barback/source_directory.dart
@@ -1,17 +1,46 @@
+// Copyright (c) 2014, 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.barback.source_directory;
+
 import 'dart:async';
+
 import 'package:watcher/watcher.dart';
+
 import 'asset_environment.dart';
 import 'barback_server.dart';
+
+/// A directory in the entrypoint package whose contents have been made
+/// available to barback and that are bound to a server.
 class SourceDirectory {
   final AssetEnvironment _environment;
+
+  /// The relative directory path within the package.
   final String directory;
+
+  /// The hostname to serve this directory on.
   final String hostname;
+
+  /// The port to serve this directory on.
   final int port;
+
+  /// The server bound to this directory.
+  ///
+  /// This is a future that will complete once [serve] has been called and the
+  /// server has been successfully spun up.
   Future<BarbackServer> get server => _serverCompleter.future;
   final _serverCompleter = new Completer<BarbackServer>();
+
+  /// The subscription to the [DirectoryWatcher] used to watch this directory
+  /// for changes.
+  ///
+  /// If the directory is not being watched, this will be `null`.
   StreamSubscription<WatchEvent> watchSubscription;
+
   SourceDirectory(this._environment, this.directory, this.hostname, this.port);
+
+  /// Binds a server running on [hostname]:[port] to this directory.
   Future<BarbackServer> serve() {
     return BarbackServer.bind(
         _environment,
@@ -22,13 +51,20 @@ class SourceDirectory {
       return server;
     });
   }
+
+  /// Removes the source directory from the build environment.
+  ///
+  /// Closes the server, removes the assets from barback, and stops watching it.
   Future close() {
     return server.then((server) {
       var futures = [server.close()];
+
+      // Stop watching the directory.
       if (watchSubscription != null) {
         var cancel = watchSubscription.cancel();
         if (cancel != null) futures.add(cancel);
       }
+
       return Future.wait(futures);
     });
   }