Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/polymer/src/mini/shadow.html

Index: third_party/polymer/v0_8/components/polymer/src/mini/shadow.html
diff --git a/third_party/polymer/v0_8/components/polymer/src/mini/shadow.html b/third_party/polymer/v0_8/components/polymer/src/mini/shadow.html
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index 0000000000000000000000000000000000000000..396de0a651bb481cf8ea8f52c51936b4e847a640
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+++ b/third_party/polymer/v0_8/components/polymer/src/mini/shadow.html
@@ -0,0 +1,41 @@
+<!--
+@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="../lib/settings.html">
+<script>
+  
+  /**
+    Implements `shadyRoot` compatible dom scoping using native ShadowDOM.
+  */
+
+  // Transform styles if not using ShadowDOM or if flag is set.
+
+  if (Polymer.Settings.useShadow) {
+
+    Polymer.Base._addFeature({
+
+      // no-op's when ShadowDOM is in use
+      _poolContent: function() {},
+      _beginDistribute: function() {},
+      distributeContent: function() {},
+      _distributeContent: function() {},
+      _finishDistribute: function() {},
+      
+      // create a shadowRoot
+      _createLocalRoot: function() {
+        this.createShadowRoot();
+        this.shadowRoot.appendChild(this.root);
+        this.root = this.shadowRoot;
+      }
+
+    });
+
+  }
+
+</script>