Fixing bots after Polymer element integration

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 10 matching lines @@
     {bool checkDocType: true}) {
   // TODO(jmesserly): make HTTP encoding configurable
   var parser = new HtmlParser(contents, encoding: 'utf8', generateSpans: true,
       sourceUrl: sourcePath);
   var document = parser.parse();
 
   // Note: errors aren't fatal in HTML (unless strict mode is on).
   // So just print them as warnings.
   for (var e in parser.errors) {
     if (checkDocType || e.errorCode != 'expected-doctype-but-got-start-tag') {
-      logger.warning(e.message, e.span);
+      logger.warning(e.message, span: e.span);
     }
   }
   return document;
 }
 
 /** Additional options used by polymer transformers */
 class TransformOptions {
   String currentPackage;
   List<String> entryPoints;
 
@@ skipping 111 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));
 }