smbprovider: Add ReadDirectoryOptions and GetMetadataEntryOptions

Adds protobufs for ReadDirectory and GetMetadataEntry inputs.

BUG=chromium:757625
TEST=runs locally

Change-Id: Ia59d17229355255d41a0ec0a3e04140a32e85d85
Reviewed-on: https://chromium-review.googlesource.com/792599
Commit-Ready: Allen Vicencio <allenvic@chromium.org>
Tested-by: Allen Vicencio <allenvic@chromium.org>
Tested-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
1 file changed