Update polymer to commit b7200854b2441a22ce89f6563963f36c50f5150d

pkg/polymer/lib/src/loader.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.
 
 part of polymer;
 
 /** Annotation used to automatically register polymer elements. */
 class CustomTag {
   final String tagName;
   const CustomTag(this.tagName);
@@ skipping 89 matching lines @@
  * called after all HTML imports are resolved. Polymer ensures this by asking
  * users to put their Dart script tags after all HTML imports (this is checked
  * by the linter, and Dartium will otherwise show an error message).
  */
 List<String> _discoverScripts(Document doc, String baseUri,
     [Set<Document> seen, List<String> scripts]) {
   if (seen == null) seen = new Set<Document>();
   if (scripts == null) scripts = <String>[];
   if (doc == null) {
     print('warning: $baseUri not found.');
-    return;
+    return scripts;
   }
   if (seen.contains(doc)) return scripts;
   seen.add(doc);
 
   var inlinedScriptCount = 0;
   for (var node in doc.queryAll('script,link[rel="import"]')) {
     if (node is LinkElement) {
       _discoverScripts(node.import, node.href, seen, scripts);
     } else if (node is ScriptElement && node.type == 'application/dart') {
       var url = node.src;
@@ skipping 135 matching lines @@
     print("warning: methods marked with @initMethod should take no "
         "arguments, ${method.simpleName} expects some.");
     return;
   }
   obj.invoke(method.simpleName, const []);
 }
 
 class _InitMethodAnnotation {
   const _InitMethodAnnotation();
 }