Update Polymer to fix closure compile

third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js

Index: third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js b/third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js
index 6c022f31d044c97206b1c9b11ff72cc7288358c2..8e3af75e803eb7f40cf8589144abba8365a6c3fb 100644
--- a/third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-button-behavior-extracted.js
@@ -48,8 +48,10 @@
     },
 
     /**
-     * In addition to `IronButtonState` behavior, when space key goes down, 
+     * In addition to `IronButtonState` behavior, when space key goes down,
      * create a ripple down effect.
+     *
+     * @param {!KeyboardEvent} event .
      */
     _spaceKeyDownHandler: function(event) {
       Polymer.IronButtonStateImpl._spaceKeyDownHandler.call(this, event);
@@ -59,8 +61,10 @@
     },
 
     /**
-     * In addition to `IronButtonState` behavior, when space key goes up, 
+     * In addition to `IronButtonState` behavior, when space key goes up,
      * create a ripple up effect.
+     *
+     * @param {!KeyboardEvent} event .
      */
     _spaceKeyUpHandler: function(event) {
       Polymer.IronButtonStateImpl._spaceKeyUpHandler.call(this, event);