Chrome Version       : 51.0.2704.63 (Developer Build) Built on 8.4, running on Debian 8.2 (64-bit)
URLs (if applicable) : http://dev.chromium.org/user-experience/user-data-directory
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari:
    Firefox:
         IE:

What steps will reproduce the problem?
(1) Try to clone a user profile dir with all bookmarks, extensions etc.
(2)
(3)

What is the expected result?
New identical profile to use in a new chromium instance (multiple sessions)

What happens instead?
Launching as new empty profile

Please provide any additional information below. Attach a screenshot if
possible.
While trying to create 3 different sessions with chromium, I've tried to clone my dev profile into 2 new ones, and nothing seemed to work, I alway got a fresh start in each instance instead of getting the bookmarks, etc. from the parent profile. After asking at the IRC #chromium-support channel, it seems that the documentation on this issue is misleading and wrong, as it refers to clone the "Default" profile and load it with a "chromium --user-data-dir=/path/to/profile", while this approach is not working, the one that does works is "chromium --profile-directory=profile", and it's not mentioned anywhere in the docs. As I've understood from the user "Torne" in the IRC channel, "--user-data-dir" won't work for the same chromium process, and to make it work I need a new process with new config root dir, i.e. ~/.config/chromium-new and then launch a chromium with the new path. Also not mentioned anywhere in the docs. So I guess the relevant docs pages needs to be refreshed.
http://dev.chromium.org/user-experience/user-data-directory
http://dev.chromium.org/developers/creating-and-using-profiles
Cheers :)