Enable UpdateSharePath on ERROR_NOT_FOUND from StartReadDirectory.

- UpdateSharePath will start when ERROR_NOT_FOUND is returned from
  StartReadDirectory.

Bug: 922273
Test: end to end
Change-Id: I5f8b08628ebe7fba84af0aaff05345bb93227083
Reviewed-on: https://chromium-review.googlesource.com/c/1444599
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Auto-Submit: jimmy gong <jimmyxgong@chromium.org>
Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630943}
2 files changed