BookmarkManager: Fix 'new folder text field size changes on clicking it' issue.
Fixing regression issue generated by https://crrev.com/349550.
Previous patch updates bmm.list.parentId to get correct command info.
Because of changing bmm.list.parentId, callback function is called at an unwanted time.
To fix this, holding the previous bmm.list.parentId value and use it when calling callback.
BUG=533341, 534256
TEST=manual(adding folder, deleting leaf node folder)
Review URL: https://codereview.chromium.org/
1360493003
Cr-Commit-Position: refs/heads/master@{#350093}