renderEncryptionPassphraseConfirmDialog_(passphrase) {
    var confirmDialog = new dialogs.Generic(
        chrome.i18n.getMessage('promptEncryptionPassphraseConfirmMessage'),
        goog.bind(
            function(confirmedPassphrase) {
              goog.dispose(confirmDialog);
              if (passphrase == confirmedPassphrase) {
                var chip = new panels.Chip(passphrase, true);
                this.chipHolder_.addChip(chip);
              } else {
                var errorDialog = new dialogs.Generic(
                    chrome.i18n.getMessage('keyMgmtPassphraseMismatchLabel'),
                    function() {
                      goog.dispose(errorDialog);
                    },
                    dialogs.InputType.NONE);
                this.renderDialog(errorDialog);
              }
            },
            this),
        dialogs.InputType.SECURE_TEXT, '',
        chrome.i18n.getMessage('actionEnterPassphrase'),
        chrome.i18n.getMessage('actionCancelPgpAction'));
    this.renderDialog(confirmDialog);
  }
Renders the UI elements needed for requesting a passphrase for
symmetrically encrypting the current message.
@param {string} passphrase The original passphrase
@private