Update Polymer components.

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

Index: third_party/polymer/components/iron-icons/.bower.json
diff --git a/third_party/polymer/components/iron-icons/.bower.json b/third_party/polymer/components/iron-icons/.bower.json
index fd2b040f2b0595d259d844562d421a61e89bee85..3e7e2daf5066f722fceee939d215b05ac24e8eed 100644
--- a/third_party/polymer/components/iron-icons/.bower.json
+++ b/third_party/polymer/components/iron-icons/.bower.json
@@ -1,6 +1,6 @@
 {
   "name": "iron-icons",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "A set of icons for use with iron-icon",
   "authors": [
     "The Polymer Authors"
@@ -35,11 +35,11 @@
     "util",
     "update-icons.sh"
   ],
-  "_release": "1.2.0",
+  "_release": "1.2.1",
   "_resolution": {
     "type": "version",
-    "tag": "v1.2.0",
-    "commit": "3752efe4bb6c248b9dfeefb73f0d1ce6d446dff7"
+    "tag": "v1.2.1",
+    "commit": "25b360efd0e751390e1916f012b8e769de0a1353"
   },
   "_source": "https://github.com/PolymerElements/iron-icons.git",
   "_target": "^1.0.0",