[polymer] import all elements

pkg/polymer/lib/elements/polymer-collapse/polymer-collapse.css

Index: pkg/polymer/lib/elements/polymer-collapse/polymer-collapse.css
diff --git a/samples/third_party/todomvc/web/lib-elements/simple_router.html b/pkg/polymer/lib/elements/polymer-collapse/polymer-collapse.css
similarity index 53%
copy from samples/third_party/todomvc/web/lib-elements/simple_router.html
copy to pkg/polymer/lib/elements/polymer-collapse/polymer-collapse.css
index 909036e3996a2c0317a4d4d8a4562ba6e49a9dc4..f9e577e016d9b93d976cd99159fced8458099711 100644
--- a/samples/third_party/todomvc/web/lib-elements/simple_router.html
+++ b/pkg/polymer/lib/elements/polymer-collapse/polymer-collapse.css
@@ -1,8 +1,8 @@
-<!--
+/*
 Copyright 2013 The Polymer Authors. All rights reserved.
 Use of this source code is governed by a BSD-style
 license that can be found in the LICENSE file.
--->
-<polymer-element name="simple-router">
-  <script type="application/dart" src="simple_router.dart"></script>
-</polymer-element>
+*/
+.polymer-collapse-closed {
+  display: none;
+}