Add packages/ directories for dart files in web/.

utils/pub/entrypoint.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('entrypoint');
 
 #import('io.dart');
 #import('lock_file.dart');
 #import('package.dart');
 #import('root_source.dart');
@@ skipping 220 matching lines @@
 
   /**
    * If `bin/`, `test/`, or `example/` directories exist, symlink `packages/`
    * into them so that their entrypoints can be run. Do the same for any
    * subdirectories of `test/` and `example/`.
    */
   Future _linkSecondaryPackageDirs(_) {
     var binDir = join(root.dir, 'bin');
     var testDir = join(root.dir, 'test');
     var exampleDir = join(root.dir, 'example');
+    var webDir = join(root.dir, 'web');
     return dirExists(binDir).chain((exists) {
       if (!exists) return new Future.immediate(null);
       return _linkSecondaryPackageDir(binDir);
     }).chain((_) => _linkSecondaryPackageDirsRecursively(testDir))
-      .chain((_) => _linkSecondaryPackageDirsRecursively(exampleDir));
+      .chain((_) => _linkSecondaryPackageDirsRecursively(exampleDir))
+      .chain((_) => _linkSecondaryPackageDirsRecursively(webDir));
   }
 
   /**
    * Creates a symlink to the `packages` directory in [dir] and all its
    * subdirectories.
    */
   Future _linkSecondaryPackageDirsRecursively(String dir) {
     return dirExists(dir).chain((exists) {
       if (!exists) return new Future.immediate(null);
       return _linkSecondaryPackageDir(dir)
@@ skipping 34 matching lines @@
    * Creates a symlink to the `packages` directory in [dir] if none exists.
    */
   Future _linkSecondaryPackageDir(String dir) {
     var to = join(dir, 'packages');
     return exists(to).chain((exists) {
       if (exists) return new Future.immediate(null);
       return createSymlink(path, to);
     });
   }
 }