GitLab

Currently bookmark root node has 4 children instead of 5. The DCHECK
is never ran.

The java code calling into this is probably dead code, added a comment.

Bug: 1148498
Change-Id: I20630b20ba8454665a8d1721f62e2baa312263b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2535923Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827192}