Fixes the deploy step used by the bots in windows

pkg/polymer/lib/src/build/common.dart

 // Copyright (c) 2013, 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.
 
 /** Common methods used by transfomers. */
 library polymer.src.build.common;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
@@ skipping 18 matching lines @@
   for (var e in parser.errors) {
     if (checkDocType || e.errorCode != 'expected-doctype-but-got-start-tag') {
       logger.warning(e.message, span: e.span);
     }
   }
   return document;
 }
 
 /** Additional options used by polymer transformers */
 class TransformOptions {
-  List<String> entryPoints;
+  /**
+   * List of entrypoints paths. The paths are relative to the package root and
+   * are represented using posix style, which matches the representation used in
+   * asset ids in barback. If null, anything under 'web/' or 'test/' is
+   * considered an entry point. 
+   */
+  final List<String> entryPoints;
 
   /**
    * True to enable Content Security Policy.
    * This means the HTML page will include *.dart.precompiled.js
    *
    * This flag has no effect unless [directlyIncludeJS] is enabled.
    */
-  bool contentSecurityPolicy;
+  final bool contentSecurityPolicy;
 
   /**
    * True to include the compiled JavaScript directly from the HTML page.
    * If enabled this will remove "packages/browser/dart.js" and replace
    * `type="application/dart"` scripts with equivalent *.dart.js files.
    *
    * If [contentSecurityPolicy] enabled, this will reference files
    * named *.dart.precompiled.js.
    */
-  bool directlyIncludeJS;
+  final bool directlyIncludeJS;
 
   TransformOptions({entryPoints, this.contentSecurityPolicy: false,
       this.directlyIncludeJS: true})
       : entryPoints = entryPoints == null ? null
           : entryPoints.map(_systemToAssetPath).toList();
 
   /** Whether an asset with [id] is an entry point HTML file. */
   bool isHtmlEntryPoint(AssetId id) {
     if (id.extension != '.html') return false;
 
@@ skipping 104 matching lines @@
   return builder.relative(builder.join('/', id.path),
       from: builder.join('/', builder.dirname(sourceId.path)));
 }
 
 
 /** Convert system paths to asset paths (asset paths are posix style). */
 String _systemToAssetPath(String assetPath) {
   if (path.Style.platform != path.Style.windows) return assetPath;
   return path.posix.joinAll(path.split(assetPath));
 }