Update Polymer components.

third_party/polymer/components/paper-icon-button/.bower.json

Index: third_party/polymer/components/paper-icon-button/.bower.json
diff --git a/third_party/polymer/components/paper-icon-button/.bower.json b/third_party/polymer/components/paper-icon-button/.bower.json
index 839ab0260851031b3edf7b6237191b010bc4aa66..1bccd85d4c3fd7ce9aa5ae24bb338900aeb66e6f 100644
--- a/third_party/polymer/components/paper-icon-button/.bower.json
+++ b/third_party/polymer/components/paper-icon-button/.bower.json
@@ -1,7 +1,7 @@
 {
   "name": "paper-icon-button",
   "private": true,
-  "version": "1.1.4",
+  "version": "1.1.6",
   "license": "http://polymer.github.io/LICENSE.txt",
   "description": "A material design icon button",
   "main": [
@@ -38,11 +38,11 @@
   },
   "ignore": [],
   "homepage": "https://github.com/PolymerElements/paper-icon-button",
-  "_release": "1.1.4",
+  "_release": "1.1.6",
   "_resolution": {
     "type": "version",
-    "tag": "v1.1.4",
-    "commit": "c5e1da4fb79684059174dddea6891f9c504f9f4f"
+    "tag": "v1.1.6",
+    "commit": "22fd17e262f5e1dd543f67cb4b7fee6ad94c759c"
   },
   "_source": "https://github.com/PolymerElements/paper-icon-button.git",
   "_target": "^1.0.0",