/usr/lib/x86_64-linux-gnu/libusermetricsinput.so is in libusermetricsinput1-dev 1.1.1+14.04.20140305-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libusermetricsinput.so.1