message: Fix use of deprecated module
  Use PropTypes from "prop-types" instead of the deprecated React.PropTypes
  submodule.
diff: @@ -17,6 +17,7 @@ limitations under the License.
  "use strict";
  import React from "react";
  +import PropTypes from "prop-types";
  import { _t } from '../../../languageHandler';
  /**
  @@ -27,15 +28,15 @@ module.exports = React.createClass({
  propTypes: {
  // The primary button which is styled differently and has default focus.
  - primaryButton: React.PropTypes.node.isRequired,
  + primaryButton: PropTypes.node.isRequired,
  // onClick handler for the primary button.
  - onPrimaryButtonClick: React.PropTypes.func.isRequired,
  + onPrimaryButtonClick: PropTypes.func.isRequired,
  // onClick handler for the cancel button.
  - onCancel: React.PropTypes.func.isRequired,
  + onCancel: PropTypes.func.isRequired,
  - focus: React.PropTypes.bool,
  + focus: PropTypes.bool,
  },
  render: function() {
  