Fixing bug with initialization volumes.

chrome/browser/resources/file_manager/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.
 
 /**
  * VolumeManager is responsible for tracking list of mounted volumes.
  *
  * @constructor
  * @extends {cr.EventTarget}
  */
 function VolumeManager() {
   /**
    * The list of archives requested to mount. We will show contents once
    * archive is mounted, but only for mounts from within this filebrowser tab.
    * @type {Object.<string, Object>}
    * @private
    */
   this.requests_ = {};
 
   /**
    * @type {Object.<string, Object>}
    * @private
    */
   this.mountedVolumes_ = {};
 
   this.initMountPoints_();
-  chrome.fileBrowserPrivate.onMountCompleted.addListener(
-        this.onMountCompleted_.bind(this));
   this.gDataStatus_ = VolumeManager.GDataStatus.UNMOUNTED;
 }
 
 /**
  * VolumeManager extends cr.EventTarget.
  */
 VolumeManager.prototype.__proto__ = cr.EventTarget.prototype;
 
 /**
  * @enum
@@ skipping 88 matching lines @@
         mountedVolumes.push(volume);
         index++;
         step(mountPoints);
       }
       self.makeVolumeInfo_('/' + info.mountPath, error, onVolumeInfo);
     } else {
       for (var i = 0; i < mountedVolumes.length; i++) {
         var volume = mountedVolumes[i];
         self.mountedVolumes_[volume.mountPath] = volume;
       }
+
+      // Subscribe to the mount completed event when mount points initialized.
+      chrome.fileBrowserPrivate.onMountCompleted.addListener(
+          self.onMountCompleted_.bind(self));
+
       if (mountedVolumes.length > 0)
         cr.dispatchSimpleEvent(self, 'change');
     }
   }
 
   chrome.fileBrowserPrivate.getMountPoints(step);
 };
 
 /**
  * Event handler called when some volume was mounted or unmouted.
@@ skipping 315 matching lines @@
 };
 
 /**
  * @param {string} mountPath Mount path.
  * @private
  */
 VolumeManager.prototype.validateMountPath_ = function(mountPath) {
   if (!/^\/(((archive|removable)\/[^\/]+)|drive|Downloads)$/.test(mountPath))
     throw new Error('Invalid mount path: ', mountPath);
 };