Add paper-menu-button and its dependencies to third_party/polymer

third_party/polymer/v1_0/components-chromium/iron-dropdown/.bower.json

Index: third_party/polymer/v1_0/components-chromium/iron-dropdown/.bower.json
diff --git a/third_party/polymer/v1_0/components-chromium/iron-dropdown/.bower.json b/third_party/polymer/v1_0/components-chromium/iron-dropdown/.bower.json
new file mode 100644
index 0000000000000000000000000000000000000000..748b37b0cfd56d3f0b5dcd3f509ceab96edf1ab3
--- /dev/null
+++ b/third_party/polymer/v1_0/components-chromium/iron-dropdown/.bower.json
@@ -0,0 +1,48 @@
+{
+  "name": "iron-dropdown",
+  "version": "1.0.3",
+  "description": "",
+  "authors": [
+    "The Polymer Authors"
+  ],
+  "keywords": [
+    "web-components",
+    "web-component",
+    "polymer"
+  ],
+  "main": "iron-dropdown.html",
+  "private": true,
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/PolymerElements/iron-dropdown"
+  },
+  "license": "http://polymer.github.io/LICENSE.txt",
+  "homepage": "https://github.com/PolymerElements/iron-dropdown",
+  "dependencies": {
+    "polymer": "polymer/polymer#^1.0.0",
+    "iron-behaviors": "polymerelements/iron-behaviors#^1.0.0",
+    "iron-overlay-behavior": "polymerelements/iron-overlay-behavior#^1.0.0",
+    "iron-resizable-behavior": "polymerelements/iron-resizable-behavior#^1.0.0",
+    "neon-animation": "polymerelements/neon-animation#^1.0.0",
+    "iron-a11y-keys-behavior": "polymerelements/iron-a11y-keys-behavior#^1.0.0",
+    "iron-image": "polymerelements/iron-image#^1.0.0"
+  },
+  "devDependencies": {
+    "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
+    "test-fixture": "polymerelements/test-fixture#^1.0.0",
+    "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
+    "paper-styles": "polymerelements/paper-styles#^1.0.0",
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
+    "web-component-tester": "*",
+    "iron-image": "polymerelements/iron-image#^1.0.0"
+  },
+  "_release": "1.0.3",
+  "_resolution": {
+    "type": "version",
+    "tag": "v1.0.3",
+    "commit": "1373bee6eb6a52108aeb6203a2841fd7d421859e"
+  },
+  "_source": "git://github.com/PolymerElements/iron-dropdown.git",
+  "_target": "~1.0.0",
+  "_originalSource": "PolymerElements/iron-dropdown"
+}