Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/paper-behaviors/demo/paper-button.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="../../paper-card/paper-card.html">
+<link rel="import" href="../paper-button-behavior.html">
+
+<dom-module id="paper-button">
+
+  <style>
+
+    :host {
+      display: inline-block;
+      background-color: #4285F4;
+      color: #fff;
+      border-radius: 3px;
+      text-transform: uppercase;
+      outline: none;
+      -moz-user-select: none;
+      -ms-user-select: none;
+      -webkit-user-select: none;
+      user-select: none;
+      cursor: pointer;
+    }
+
+    paper-card {
+      border-radius: inherit;
+      padding: 16px;
+    }
+
+    :host([disabled]) {
+      opacity: 0.3;
+      pointer-events: none;
+    }
+
+    :host([active]),
+    :host([pressed]) {
+      background-color: #3367D6;
+      box-shadow: inset 0 3px 5px rgba(0,0,0,.2);
+    }
+
+  </style>
+
+  <template>
+
+    <paper-card class="content" elevation="[[_elevation]]" animated>
+      <content></content>
+    </paper-card>
+
+  </template>
+
+  <script>
+
+    Polymer({
+
+      behaviors: [
+        Polymer.PaperButtonBehavior
+      ],
+
+      ready: function() {
+        this.raised = true;
+        if (!this.hasAttribute('role')) {
+          this.setAttribute('role', 'button');
+        }
+      },
+
+      _buttonStateChanged: function() {
+        this._calculateElevation();
+      }
+
+    });
+
+  </script>
+
+</dom-module>