Simplify fileBrowserPrivate.getDriveConnectionStatus().

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 187 matching lines @@
   callback();
 };
 
 /**
  * @return {util.DriveConnectionType} Current drive connection state.
  */
 VolumeManagerWrapper.prototype.getDriveConnectionState = function() {
   if (!this.driveEnabled_ || !this.volumeManager_) {
     return {
       type: util.DriveConnectionType.OFFLINE,
-      reasons: [util.DriveConnectionReason.NO_SERVICE]
+      reason: util.DriveConnectionReason.NO_SERVICE
     };
   }
 
   return this.volumeManager_.getDriveConnectionState();
 };
 
 /**
  * @param {string} mountPath The path to mount location of the volume.
  * @return {VolumeInfo} The VolumeInfo instance for the volume mounted at
  *     mountPath, or null if no volume is found
@@ skipping 106 matching lines @@
  * @param {VolumeInfo} volumeInfo Volume info.
  * @return {VolumeInfo} Null if the drive is disabled and the given volume is
  *     drive. Otherwise just returns the volume.
  * @private
  */
 VolumeManagerWrapper.prototype.filterDisabledDriveVolume_ =
     function(volumeInfo) {
   var isDrive = volumeInfo && volumeInfo.volumeType === util.VolumeType.DRIVE;
   return this.driveEnabled_ || !isDrive ? volumeInfo : null;
 };