[Files.app] Split the JavaScript files into subdirectories: common, background, and foreground

chrome/browser/resources/file_manager/foreground/js/volume_manager_wrapper.js

 // Copyright 2013 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.
 
 /**
  * Thin wrapper for VolumeManager. This should be an interface proxy to talk
  * to VolumeManager. This class also filters Drive related data/events if
  * driveEnabled is set to false.
  *
  * @param {VolumeManagerWrapper.DriveEnabledStatus} driveEnabled DRIVE_ENABLED
@@ skipping 270 matching lines @@
 
   // If the drive is disabled, any resolving the path under drive should be
   // failed.
   if (!this.driveEnabled_ && PathUtil.isDriveBasedPath(path)) {
     errorCallback(util.createFileError(FileError.NOT_FOUND_ERR));
     return;
   }
 
   this.volumeManager_.resolvePath(path, successCallback, errorCallback);
 };