Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/paper-button/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
+The complete set of authors may be found at http://polymer.github.io/AUTHORS
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
+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
+-->
+
+<!--
+
+Material Design: <a href="http://www.google.com/design/spec/components/buttons.html">Buttons</a>
+
+`paper-button` is a button. When the user touches the button, a ripple effect emanates
+from the point of contact. It may be flat or raised. A raised button is styled with a
+shadow.
+
+Example:
+
+    <paper-button>flat button</paper-button>
+    <paper-button raised>raised button</paper-button>
+    <paper-button noink>No ripple effect</paper-button>
+
+You may use custom DOM in the button body to create a variety of buttons. For example, to
+create a button with an icon and some text:
+
+    <paper-button>
+      <core-icon icon="favorite"></core-icon>
+      custom button content
+    </paper-button>
+
+## Styling
+
+Style the button with CSS as you would a normal DOM element.
+
+    /* make #my-button green with yellow text */
+    #my-button {
+        background: green;
+        color: yellow;
+    }
+
+By default, the ripple is the same color as the foreground at 25% opacity. You may
+customize the color using this selector:
+
+    /* make #my-button use a blue ripple instead of foreground color */
+    #my-button::shadow paper-ripple {
+      color: blue;
+    }
+
+The opacity of the ripple is not customizable via CSS.
+
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../paper-card/paper-card.html">
+<link rel="import" href="../paper-ripple/paper-ripple.html">
+
+<link rel="import" href="../paper-behaviors/paper-button-behavior.html">
+
+<dom-module id="paper-button">
+
+  <style>
+
+    :host {
+      display: inline-block;
+      position: relative;
+      box-sizing: border-box;
+      min-width: 5.14em;
+      margin: 0 0.29em;
+      background: transparent;
+      text-align: center;
+      font: inherit;
+      text-transform: uppercase;
+      outline: none;
+      border-radius: 3px;
+      -moz-user-select: none;
+      -ms-user-select: none;
+      -webkit-user-select: none;
+      user-select: none;
+      cursor: pointer;
+      z-index: 0;
+    }
+
+    :host([disabled]) {
+      background: #eaeaea;
+      color: #a8a8a8;
+      cursor: auto;
+      pointer-events: none;
+    }
+
+    :host([noink]) paper-ripple {
+      display: none;
+    }
+
+    paper-card {
+      border-radius: inherit;
+    }
+
+    .content > ::content * {
+      text-transform: inherit;
+    }
+
+    .content {
+      padding: 0.7em 0.57em
+    }
+  </style>
+
+  <template>
+
+    <paper-ripple></paper-ripple>
+
+    <paper-card class="content" elevation="[[_elevation]]" animated>
+      <content></content>
+    </paper-card>
+
+  </template>
+
+  <script>
+
+    Polymer({
+
+      behaviors: [
+        Polymer.PaperButtonBehavior
+      ],
+
+      properties: {
+
+        /**
+         * If true, the button should be styled with a shadow.
+         *
+         * @attribute raised
+         * @type boolean
+         * @default false
+         */
+        raised: {
+          type: Boolean,
+          reflectToAttribute: true,
+          value: false,
+          observer: '_buttonStateChanged'
+        }
+
+      },
+
+      ready: function() {
+        if (!this.hasAttribute('role')) {
+          this.setAttribute('role', 'button');
+        }
+      },
+
+      _buttonStateChanged: function() {
+        this._calculateElevation();
+      }
+
+    });
+
+  </script>
+
+</dom-module>
+