ndChild(fakeSubmit);

      fakeSubmit.click();

      this.removeChild(fakeSubmit);
    },

    /**
     * Resets all non-disabled form custom elements to their initial values.
     */
    _resetCustomElements: function() {
      // Reset all the registered custom components. We need to do this after
      // the native reset, since programmatically changing the `value` of some
      // native elements (iron-input in particular) does not notify its
      // parent `paper-input`, which will now display the 