Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/polymer/bower.json

Index: third_party/polymer/v0_8/components/polymer/bower.json
diff --git a/third_party/polymer/v0_8/components/polymer/bower.json b/third_party/polymer/v0_8/components/polymer/bower.json
new file mode 100644
index 0000000000000000000000000000000000000000..f2bb8f7466c18830dbbf05a8721e35da4e6a1732
--- /dev/null
+++ b/third_party/polymer/v0_8/components/polymer/bower.json
@@ -0,0 +1,26 @@
+{
+  "name": "polymer",
+  "version": "0.8.0-rc.7",
+  "main": [
+    "polymer.html"
+  ],
+  "license": "http://polymer.github.io/LICENSE.txt",
+  "ignore": [
+    "/.*",
+    "/test/"
+  ],
+  "authors": [
+    "The Polymer Authors (http://polymer.github.io/AUTHORS.txt)"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Polymer/polymer.git"
+  },
+  "dependencies": {
+    "webcomponentsjs": "^0.6.0"
+  },
+  "devDependencies": {
+    "web-component-tester": "*"
+  },
+  "private": true
+}