/usr/lib/python2.7/dist-packages/httplib2/cacerts.txt is in python-httplib2 0.7.2-1ubuntu2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/httplib2/../../../../share/pyshared/httplib2/cacerts.txt