Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/paper-button/paper-button-extracted.js

+
+
+    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();
+      }
+
+    });
+
+