cros: Postpone removing user prefs in |RemoveNonCryptohomeData|

Bug: 778077
Change-Id: Id68b2f08d151b01f9c1f090513b1bae7fa7ea741
Reviewed-on: https://chromium-review.googlesource.com/862710
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529172}
2 files changed