Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/polymer/polymer-micro-extracted.js

Index: third_party/polymer/v0_8/components-chromium/polymer/polymer-micro-extracted.js
diff --git a/third_party/polymer/v0_8/components-chromium/polymer/polymer-micro-extracted.js b/third_party/polymer/v0_8/components-chromium/polymer/polymer-micro-extracted.js
new file mode 100644
index 0000000000000000000000000000000000000000..1d2a0d50581c0a4025d0d5110cad849e4d316346
--- /dev/null
+++ b/third_party/polymer/v0_8/components-chromium/polymer/polymer-micro-extracted.js
@@ -0,0 +1,31 @@
+
+
+  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);
+    }
+
+  });
+