Update Polymer to fix closure compile

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

 /** @polymerBehavior Polymer.PaperButtonBehavior */
   Polymer.PaperButtonBehaviorImpl = {
 
     properties: {
 
       /**
        * The z-depth of this element, from 0-5. Setting to 0 will remove the
        * shadow, and each increasing number greater than 0 will be "deeper"
        * than the last.
        *
@@ skipping 30 matching lines @@
         e = 3;
       }
       this._setElevation(e);
     },
 
     _computeKeyboardClass: function(receivedFocusFromKeyboard) {
       this.classList.toggle('keyboard-focus', receivedFocusFromKeyboard);
     },
 
     /**
-     * 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);
       if (this.hasRipple()) {
         this._ripple.uiDownAction();
       }
     },
 
     /**
-     * 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);
       if (this.hasRipple()) {
         this._ripple.uiUpAction();
       }
     }
 
   };
 
   /** @polymerBehavior */
   Polymer.PaperButtonBehavior = [
     Polymer.IronButtonState,
     Polymer.IronControlState,
     Polymer.PaperRippleBehavior,
     Polymer.PaperButtonBehaviorImpl
   ];