Update Polymer components.

third_party/polymer/components/iron-icon/.bower.json

Index: third_party/polymer/components/iron-icon/.bower.json
diff --git a/third_party/polymer/components/iron-icon/.bower.json b/third_party/polymer/components/iron-icon/.bower.json
index 62b70160e883d5be18543d29d7dff4c7cde6c74e..1fc1db97f6d686fa3024e489490066eed96c7225 100644
--- a/third_party/polymer/components/iron-icon/.bower.json
+++ b/third_party/polymer/components/iron-icon/.bower.json
@@ -1,7 +1,7 @@
 {
   "name": "iron-icon",
   "private": true,
-  "version": "1.0.12",
+  "version": "1.0.13",
   "license": "http://polymer.github.io/LICENSE.txt",
   "description": "An element that supports displaying an icon",
   "main": "iron-icon.html",
@@ -33,11 +33,11 @@
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
   },
   "homepage": "https://github.com/PolymerElements/iron-icon",
-  "_release": "1.0.12",
+  "_release": "1.0.13",
   "_resolution": {
     "type": "version",
-    "tag": "v1.0.12",
-    "commit": "e6bce09a074f9f8433f168081405b7e44d525c62"
+    "tag": "v1.0.13",
+    "commit": "4ea0cab59cb2bdfd537e72c9cfbd4af099acb5c9"
   },
   "_source": "https://github.com/PolymerElements/iron-icon.git",
   "_target": "^1.0.0",