[MediaRouter UI] Compile MR WebUI js code with Closure.

third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js

Index: third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js b/third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js
index d9fa92458be22ac3553b89c818d07d6aa8cd006f..54b3fd4a737e9fbcad5eed3f0f7a2e3afaa8c8f8 100644
--- a/third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-extracted.js
@@ -246,11 +246,12 @@
         /**
          * Returns false if the element is required and does not have a selection,
          * and true otherwise.
+         * @param {Object} ignored
          * @return {boolean} true if `required` is false, or if `required` is true
          * and the element has a valid selection.
          */
-        _getValidity: function() {
-          return this.disabled || !this.required || (this.required && this.value);
+        _getValidity: function(ignored) {

[Dan Beam, 2015/12/12 01:43:02]

lgtm if you revert this

[imcheng, 2015/12/14 22:47:00]

Done.

+          return this.disabled || !this.required || (this.required && !!this.value);
         },
 
         _openedChanged: function() {
@@ -261,4 +262,4 @@
           }
         }
       });
-    })();
+    })();