[IMP] travis_install_nightly: allow to pin a specific Chrome version (#367)
[IMP] travis_install_nightly: allow to pin a specific Chrome version (#367)

It was already possible to pin Chrome version, but only to the one
provided in the OS.

Now it's possible to pass a specific Chrome version number.
Vauxoo/maintainer-quality-tools,Vauxoo/maintainer-quality-tools,Vauxoo/maintainer-quality-tools