
    _updateAriaLabelledBy: function() {
      var label = Polymer.dom(this.root).querySelector('label');
      if (!label) {
        this._ariaLabelledBy = '';
        return;
      }
      var labelledBy;
      if (label.id) {
        labelledBy = label.id;
      } else {
        labelledBy = 'paper-input-label-' + new Date().getUTCMilliseconds();
        label.id = labelledBy;
      }
      this._ariaLabelledBy = labelledBy;
    },

    _onChange:function(event) {
      // In the Shadow DOM, the `change`