Convert all unresolved hostnames to cannonical format

For chromad kerberos users, we do not resolve mount paths and instead
rely on the domain controller to resolve it. This CL fixes a bug where
windows URIs were not converted to the cannoncial smb:// format that is
expected by libsmbclient resulting in an INVALID_OPERATION error.

Bug: chromium:906269
Change-Id: I363e9375a32d2d0d6a990c0fdaab11a4aced064a
Reviewed-on: https://chromium-review.googlesource.com/c/1341022Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609532}

chrome/browser/chromeos/smb_client/smb_service.cc

@@ -200,7 +200,7 @@ void SmbService::CallMount(const file_system_provider::MountOptions& options,
   // service tickets are keyed on hosname.
   const base::FilePath mount_path =
       use_chromad_kerberos
-          ? share_path
+          ? base::FilePath(parsed_url.ToString())
           : base::FilePath(share_finder_->GetResolvedUrl(parsed_url));
 
   GetSmbProviderClient()->Mount(