

<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">

<script>
  (function() {
    'use strict';

    /**
     * The IronDropdownScrollManager is intended to provide a central source
     * of authority and control over which elements in a document are currently
     * allowed to scroll.
     */

    Polymer.IronDropdownScrollManager = {

      /**
       * The current element that defines the DOM boundaries of the
       * s