Fix crash if bookmarks are added to their original parent folder

Chrome will crash if we select some bookmarks and then add them
to their parent folder. This CL is trying to fix that.

Bug: 1012651
Change-Id: I164de82a84bf922c5acdcea560a033291856708d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1850418
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Lijin Shen <lazzzis@google.com>
Cr-Commit-Position: refs/heads/master@{#705726}