[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/paper-material/paper-material-shared-styles.html

 <!--
 @license
 Copyright (c) 2015 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="../../polymer/polymer.html">
-<link rel="import" href="../iron-menu-behavior.html">
+<dom-module id="paper-material-shared-styles">
+  <template>
+    <style>
+      :host {
+        display: block;
+        position: relative;
+      }
 
-<dom-module id="simple-menu">
+      :host([elevation="1"]) {
+        @apply(--shadow-elevation-2dp);
+      }
 
-  <style>
+      :host([elevation="2"]) {
+        @apply(--shadow-elevation-4dp);
+      }
 
-    .content ::content > .iron-selected {
-      color: red;
-    }
+      :host([elevation="3"]) {
+        @apply(--shadow-elevation-6dp);
+      }
 
-  </style>
+      :host([elevation="4"]) {
+        @apply(--shadow-elevation-8dp);
+      }
 
-  <template>
-
-    <div class="content">
-      <content></content>
-    </div>
-
+      :host([elevation="5"]) {
+        @apply(--shadow-elevation-16dp);
+      }
+    </style>
   </template>
-
 </dom-module>
-
-<script>
-
-(function() {
-
-  Polymer({
-
-    is: 'simple-menu',
-
-    behaviors: [
-      Polymer.IronMenuBehavior
-    ]
-
-  });
-
-})();
-
-</script>