Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/polymer/polymer-micro.html

+<!--
+@license
+Copyright (c) 2014 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="src/polymer-lib.html">
+<link rel="import" href="src/micro/tag.html">
+<link rel="import" href="src/micro/behaviors.html">
+<link rel="import" href="src/micro/extends.html">
+<link rel="import" href="src/micro/constructor.html">
+<link rel="import" href="src/micro/properties.html">
+<link rel="import" href="src/micro/attributes.html">
+<link rel="import" href="src/micro/debouncer.html">
+
+<script>
+
+  Polymer.Base._addFeature({
+
+    _registerFeatures: function() {
+      // identity
+      this._prepIs();
+      // shared behaviors
+      this._prepBehaviors();
+      // inheritance
+      this._prepExtends();
+      // factory
+      this._prepConstructor();
+    },
+
+    _prepBehavior: function() {},
+
+    _initFeatures: function() {
+      // setup debouncers
+      this._setupDebouncers();
+      // acquire behaviors
+      this._marshalBehaviors();
+    },
+
+    _marshalBehavior: function(b) {
+      // publish attributes to instance
+      this._installHostAttributes(b.hostAttributes);
+    }
+
+  });
+
+</script>
+