Add NetBiosHostLocator to SmbService for discovery

- Registers a NetBiosHostLocator with SmbService's share_locator_
so that shares can be discovered via NetBios

BUG=chromium:757625

Change-Id: If2e88d543ab90c3e0e79050ec41ed8d0f38220eb
Reviewed-on: https://chromium-review.googlesource.com/1136800
Commit-Queue: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575255}
2 files changed