Support directories other than "web" in pub build.

sdk/lib/_internal/pub/test/build/missing_web_directory_test.dart

Index: sdk/lib/_internal/pub/test/build/missing_web_directory_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/with_no_web_directory_test.dart b/sdk/lib/_internal/pub/test/build/missing_web_directory_test.dart
similarity index 51%
rename from sdk/lib/_internal/pub/test/build/with_no_web_directory_test.dart
rename to sdk/lib/_internal/pub/test/build/missing_web_directory_test.dart
index d25df7257f861a455ce60a9303937d09f4d14d02..ccf4264d5267c81ad0f34fbbf5eb82f23fd63579 100644
--- a/sdk/lib/_internal/pub/test/build/with_no_web_directory_test.dart
+++ b/sdk/lib/_internal/pub/test/build/missing_web_directory_test.dart
@@ -1,19 +1,19 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
+import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
 
-  integration("with no web directory", () {
+  integration("fails if 'web' doesn't exist and no directory is specified", () {
     d.appDir().create();
 
     schedulePub(args: ["build"],
-        error: new RegExp(r'^There is no "[^"]+[/\\]web" directory.$',
-            multiLine: true),
-        exitCode: 1);
+        error: 'Directory "web" does not exist.',
+        exitCode: exit_codes.DATA);
   });
 }