merge to trunk all changes from 36817 until 37378 under the packages: polymer,

pkg/polymer/lib/polymer.html

Index: pkg/polymer/lib/polymer.html
===================================================================
--- pkg/polymer/lib/polymer.html	(revision 37373)
+++ pkg/polymer/lib/polymer.html	(working copy)
@@ -4,23 +4,14 @@
  license that can be found in the LICENSE file.
 -->
 
-<script src="src/js/use_native_dartium_shadowdom.js"></script>
-
 <!--
-These two files are from the Polymer project:
-https://github.com/Polymer/platform/ and https://github.com/Polymer/polymer/.
-
-You can replace platform.js and polymer.html with different versions if desired.
+This file is from the Polymer project (https://github.com/Polymer/polymer/).
+You can replace polymer.html with a different version if desired.
 -->
 <!-- minified for deployment: -->
-<script src="../../packages/web_components/platform.js"></script>
 <link rel="import" href="src/js/polymer/polymer.html">
 
 <!-- unminfied for debugging:
-<script src="../../packages/web_components/platform.concat.js"></script>
+<link rel="import" href="src/js/polymer/layout.html">
 <script src="src/js/polymer/polymer.concat.js"></script>
-<link rel="import" href="src/js/polymer/polymer-body.html">
 -->
-
-<!-- Teach dart2js about Shadow DOM polyfill objects. -->
-<script src="../../packages/web_components/dart_support.js"></script>