/usr/share/gvfs/mounts/sftp.mount is in gvfs-backends 1.20.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Mount]
Type=sftp
Exec=/usr/lib/gvfs/gvfsd-sftp
AutoMount=false
Scheme=sftp
SchemeAliases=ssh
DefaultPort=22
HostnameIsInetAddress=true
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