Calculating dependencies... done!
[ebuild  N    ~] www-client/google-chrome-57.0.2987.110  USE="plugins" L10N="am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW" 

The following keyword changes are necessary to proceed:
 (see "package.accept_keywords" in the portage(5) man page for more details)
# required by www-client/google-chrome (argument)
=www-client/google-chrome-57.0.2987.110 ~amd64

Autounmask changes successfully written.

 * IMPORTANT: config file '/etc/portage/package.keywords/custom' needs updating.
 * See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS
 * sections of the emerge man page to learn how to update config files.