Import Polymer 0.8 and several key elements.

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

Index: third_party/polymer/v0_8/components/iron-selector/.bower.json
diff --git a/third_party/polymer/v0_8/components/iron-selector/.bower.json b/third_party/polymer/v0_8/components/iron-selector/.bower.json
new file mode 100644
index 0000000000000000000000000000000000000000..3e060c599b8da33694d508fdb196c6171308166a
--- /dev/null
+++ b/third_party/polymer/v0_8/components/iron-selector/.bower.json
@@ -0,0 +1,31 @@
+{
+  "name": "iron-selector",
+  "version": "0.8.3",
+  "private": true,
+  "main": [
+    "iron-selector.html"
+  ],
+  "authors": "The Polymer Authors",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/PolymerElements/iron-selector.git"
+  },
+  "dependencies": {
+    "polymer": "Polymer/polymer#v0.8.0-rc.7"
+  },
+  "devDependencies": {
+    "test-fixture": "PolymerElements/test-fixture#^0.8.0",
+    "web-component-tester": "Polymer/web-component-tester#^2.2.3",
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.6.0"
+  },
+  "homepage": "https://github.com/PolymerElements/iron-selector",
+  "_release": "0.8.3",
+  "_resolution": {
+    "type": "version",
+    "tag": "v0.8.3",
+    "commit": "58f87005d6eb717b05668b8a78a7c51c0893eee3"
+  },
+  "_source": "git://github.com/PolymerElements/iron-selector.git",
+  "_target": "^0.8.0",
+  "_originalSource": "PolymerElements/iron-selector"
+}