Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/iron-behaviors/.bower.json

Index: third_party/polymer/v0_8/components/iron-behaviors/.bower.json
diff --git a/third_party/polymer/v0_8/components/iron-behaviors/.bower.json b/third_party/polymer/v0_8/components/iron-behaviors/.bower.json
new file mode 100644
index 0000000000000000000000000000000000000000..f7783c23be08f1c2d1ffb7e2861a87f5b91c1ab9
--- /dev/null
+++ b/third_party/polymer/v0_8/components/iron-behaviors/.bower.json
@@ -0,0 +1,28 @@
+{
+  "name": "iron-behaviors",
+  "private": true,
+  "authors": [
+    "The Polymer Authors"
+  ],
+  "license": "MIT",
+  "dependencies": {
+    "polymer": "Polymer/polymer#v0.8.0-rc.7"
+  },
+  "devDependencies": {
+    "iron-test-helpers": "polymerelements/iron-test-helpers#^0.8.0",
+    "test-fixture": "polymerelements/test-fixture#^0.8.0",
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.6.0",
+    "web-component-tester": "*"
+  },
+  "homepage": "https://github.com/polymerelements/iron-behaviors",
+  "version": "0.8.0",
+  "_release": "0.8.0",
+  "_resolution": {
+    "type": "version",
+    "tag": "v0.8.0",
+    "commit": "bde97715665a35c467efd869174eaadf6acea2ff"
+  },
+  "_source": "git://github.com/polymerelements/iron-behaviors.git",
+  "_target": "^0.8.0",
+  "_originalSource": "polymerelements/iron-behaviors"
+}