Include MTP devices in Cloud Import happiness.

ui/file_manager/file_manager/background/js/volume_manager.js

 // Copyright (c) 2012 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.
 
 /**
  * Represents each volume, such as "drive", "download directory", each "USB
  * flush storage", or "mounted zip archive" etc.
  *
  * @constructor
  *
@@ skipping 145 matching lines @@
   },
   /**
    * @return {boolean} True if the volume contains media.
    */
   get hasMedia() {
     return this.hasMedia_;
   }
 };
 
 /**
- * Provides short hand checking of volume type.
- * @param {VolumeManagerCommon.VolumeType} type
- * @return {boolean} True if the volume is of the specified type.
- */
-VolumeInfo.prototype.isType = function(type) {
-  return type === this.volumeType_;
-};
-
-/**
  * Starts resolving the display root and obtains it.  It may take long time for
  * Drive. Once resolved, it is cached.
  *
  * @param {function(DirectoryEntry)=} opt_onSuccess Success callback with the
  *     display root directory as an argument.
  * @param {function(*)=} opt_onFailure Failure callback.
  * @return {Promise}
  */
 VolumeInfo.prototype.resolveDisplayRoot = function(opt_onSuccess,
                                                    opt_onFailure) {
@@ skipping 813 matching lines @@
       this.isDriveBased;
 
   /**
    * Whether the entry is read only or not.
    * @type {boolean}
    */
   this.isReadOnly = isReadOnly;
 
   Object.freeze(this);
 }