These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! All ebuilds that could satisfy "=www-plugins/chrome-binary-plugins-156.0.8072.0_alpha" have been masked.
!!! One of the following masked packages is required to complete your request:
- www-plugins/chrome-binary-plugins-156.0.8072.0_alpha::gentoo (masked by: package.mask, google-chrome license(s))
/Volumes/Disk 1/Repository/portage-git/profiles/package.mask:
# Mike Gilbert <floppym@gentoo.org> (2014-03-04)
# Dev channel releases are only for people who are developers or want more
# experimental features and accept a more unstable release.

A copy of the 'google-chrome' license is located at '/Volumes/Disk 1/Repository/portage-git/licenses/google-chrome'.


For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.