Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/polymer/src/mini/shadow-extracted.js

Index: third_party/polymer/v0_8/components-chromium/polymer/src/mini/shadow-extracted.js
diff --git a/third_party/polymer/v0_8/components-chromium/polymer/src/mini/shadow-extracted.js b/third_party/polymer/v0_8/components-chromium/polymer/src/mini/shadow-extracted.js
new file mode 100644
index 0000000000000000000000000000000000000000..2166e198da9a29c5f8acbde202916c9b374740ed
--- /dev/null
+++ b/third_party/polymer/v0_8/components-chromium/polymer/src/mini/shadow-extracted.js
@@ -0,0 +1,30 @@
+
+  
+  /**
+    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;
+      }
+
+    });
+
+  }
+