Support directories other than "web" in pub build.

sdk/lib/_internal/pub/lib/src/barback/server.dart

Index: sdk/lib/_internal/pub/lib/src/barback/server.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/server.dart b/sdk/lib/_internal/pub/lib/src/barback/server.dart
index 65e9f7d8d4c5c5063a0582f9b98d4ce0e6da9cb9..d285cfad3e978b42c3cf1a08422ee316f8ee9203 100644
--- a/sdk/lib/_internal/pub/lib/src/barback/server.dart
+++ b/sdk/lib/_internal/pub/lib/src/barback/server.dart
@@ -57,10 +57,10 @@ class BarbackServer {
 
   /// Creates a new server and binds it to [port] of [host].
   ///
-  /// This server will serve assets from [barback], and use [rootPackage] as the
-  /// root package.
-  static Future<BarbackServer> bind(String host, int port, Barback barback,
-      String rootPackage) {
+  /// This server will serve assets from [barback], and use [rootPackage] as
+  /// the root package.
+  static Future<BarbackServer> bind(String host, int port,
+      Barback barback, String rootPackage) {
     return Chain.track(HttpServer.bind(host, port))
         .then((server) => new BarbackServer._(server, barback, rootPackage));
   }