Files.app: Retrieve disk label name from mount path.

chrome/browser/chromeos/file_manager/volume_manager.cc

Index: chrome/browser/chromeos/file_manager/volume_manager.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager.cc b/chrome/browser/chromeos/file_manager/volume_manager.cc
index 829e1972283e30bf8a884b25c07d34ddb24747c5..c802e9027c4506a1c1345fbac3ba0c31888cb93d 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager.cc
@@ -183,11 +183,11 @@ VolumeInfo CreateVolumeInfoFromMountPointInfo(
   volume_info.source_path = base::FilePath(mount_point.source_path);
   volume_info.mount_path = base::FilePath(mount_point.mount_path);
   volume_info.mount_condition = mount_point.mount_condition;
+  volume_info.volume_label = volume_info.mount_path.BaseName().AsUTF8Unsafe();
   if (disk) {
     volume_info.device_type = disk->device_type();
     volume_info.system_path_prefix =
         base::FilePath(disk->system_path_prefix());
-    volume_info.volume_label = disk->drive_label();
     volume_info.is_parent = disk->is_parent();
     volume_info.is_read_only = disk->is_read_only();
   } else {