Update Polymer components.

third_party/polymer/components/paper-dropdown-menu/.bower.json

Index: third_party/polymer/components/paper-dropdown-menu/.bower.json
diff --git a/third_party/polymer/components/paper-dropdown-menu/.bower.json b/third_party/polymer/components/paper-dropdown-menu/.bower.json
index 947984907f8d6029515639df60a4fbfb5bd03e3a..4fe866fbb16d41d4fcd5274aece0ac0653a729f0 100644
--- a/third_party/polymer/components/paper-dropdown-menu/.bower.json
+++ b/third_party/polymer/components/paper-dropdown-menu/.bower.json
@@ -1,6 +1,6 @@
 {
   "name": "paper-dropdown-menu",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "An element that works similarly to a native browser select",
   "authors": [
     "The Polymer Authors"
@@ -25,7 +25,7 @@
     "iron-a11y-keys-behavior": "PolymerElements/iron-a11y-keys-behavior#^1.0.0",
     "iron-form-element-behavior": "PolymerElements/iron-form-element-behavior#^1.0.0",
     "iron-icon": "PolymerElements/iron-icon#^1.0.0",
-    "iron-iconset-svg": "polymerelements/iron-iconset-svg#^1.0.0",
+    "iron-iconset-svg": "PolymerElements/iron-iconset-svg#^1.0.0",
     "iron-validatable-behavior": "PolymerElements/iron-validatable-behavior#^1.0.0",
     "paper-behaviors": "PolymerElements/paper-behaviors#^1.0.0",
     "paper-input": "PolymerElements/paper-input#^1.0.9",
@@ -45,11 +45,11 @@
     "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0"
   },
   "ignore": [],
-  "_release": "1.5.0",
+  "_release": "1.5.1",
   "_resolution": {
     "type": "version",
-    "tag": "v1.5.0",
-    "commit": "1c2c2158c09a7fde3f6e12eeebe3576fb7060513"
+    "tag": "v1.5.1",
+    "commit": "38a5dcecffe911c716b0b829299a5348289fd289"
   },
   "_source": "https://github.com/PolymerElements/paper-dropdown-menu.git",
   "_target": "^1.0.0",