GitLab

Moves TranslateErrorToMountResult functions to smb_errors and adds unit
tests

Bug: 757625
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I93c415a5855d05d75cabe312c3f6cce398120d0c
Reviewed-on: https://chromium-review.googlesource.com/1087546
Commit-Queue: Allen Vicencio <allenvic@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Dave Schuyler <dschuyler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566960}