message: DialogButtons: Allow setting the cancel button class with a prop.
diff: @@ -40,6 +40,10 @@ export default createReactClass({
  // should there be a cancel button? default: true
  hasCancel: PropTypes.bool,
  + // The class of the cancel button, only used if a cancel button is
  + // enabled
  + cancelButtonClass: PropTypes.node,
  +
  // onClick handler for the cancel button.
  onCancel: PropTypes.func,
  @@ -69,8 +73,10 @@ export default createReactClass({
  primaryButtonClassName += " " + this.props.primaryButtonClass;
  }
  let cancelButton;
  +
  if (this.props.cancelButton || this.props.hasCancel) {
  - cancelButton = <button onClick={this._onCancelClick} disabled={this.props.disabled}>
  + cancelButton = <button className={this.props.cancelButtonClass}
  + onClick={this._onCancelClick} disabled={this.props.disabled}>
  { this.props.cancelButton || _t("Cancel") }
  </button>;
  }
  