ui/file_manager/file_manager/test/js/externs.js

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview External objects and functions required for compiling.
 */

/** @param {...*} var_args */
ChromeEvent.prototype.dispatchEvent = (var_args) => {};

/** @constructor */
function FileManager() {
  /** @type {!Crostini} */
  this.crostini;

  /**
   * Declare as FileBrowserBackground rather than FileBrowserBackgroundFull to
   * simplify deps.  Individual fields such as progressCenter below can be
   * defined as needed.
   * @type {!FileBrowserBackground}}
   */
  this.fileBrowserBackground_;
}

/** @type {string} */
let FILE_MANAGER_ROOT;

/** @type {!FileManager} */
let fileManager;

/**
 * Declare ProgressCenterPanel here rather than deal with its deps.  It is
 * referenced in //ui/file_manager/externs/background/progress_center.js
 * @constructor
 */
function ProgressCenterPanel() {}

/** @type {!ProgressCenter} */
fileManager.fileBrowserBackground_.progressCenter;

/** @type {!FileBrowserBackground} */
window.background;