filemanager: Files App change necessary to use "drive/root". It still works with "drive".

chrome/browser/resources/file_manager/js/volume_manager.js

Index: chrome/browser/resources/file_manager/js/volume_manager.js
diff --git a/chrome/browser/resources/file_manager/js/volume_manager.js b/chrome/browser/resources/file_manager/js/volume_manager.js
index ce0e586437a7bcb1039b666c02acf004fe9f602b..73237b972c6575072608f4401878f17ddf33b52f 100644
--- a/chrome/browser/resources/file_manager/js/volume_manager.js
+++ b/chrome/browser/resources/file_manager/js/volume_manager.js
@@ -520,7 +520,8 @@ VolumeManager.prototype.validateError_ = function(error) {
  * @private
  */
 VolumeManager.prototype.validateMountPath_ = function(mountPath) {
-  if (!/^\/(((archive|removable)\/[^\/]+)|drive|drive_offline|Downloads)$/.
-      test(mountPath))
+  console.log(mountPath);
+  if (!/^\/(drive|drive_offline|Downloads)$/.test(mountPath) &&
+      !/^\/((archive|removable|drive)\/[^\/]+)$/.test(mountPath))
     throw new Error('Invalid mount path: ', mountPath);
 };