Polymer elements added to third_party/polymer.

third_party/polymer/components/core-collapse/core-collapse.css

Index: third_party/polymer/components/core-collapse/core-collapse.css
diff --git a/third_party/polymer/polymer/polymer.html b/third_party/polymer/components/core-collapse/core-collapse.css
similarity index 77%
copy from third_party/polymer/polymer/polymer.html
copy to third_party/polymer/components/core-collapse/core-collapse.css
index 424006a04e7d1837ec411f5db7b89b7c07f62a48..5e946ff74b8893b0ca21ead44d22fd08b554ffd8 100644
--- a/third_party/polymer/polymer/polymer.html
+++ b/third_party/polymer/components/core-collapse/core-collapse.css
@@ -1,13 +1,16 @@
-<!--
+/*
 Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
+*/
 
-<link rel="import" href="layout.html">
+html /deep/ core-collapse {
+  display: block;
+}
 
-<script src="polymer.js"></script>
-<!--<link rel="import" href="../polymer-dev/polymer.html">--> 
+html /deep/ .core-collapse-closed {
+  display: none;
+}