Chrome Version: (copy from chrome://version)
OS: (e.g. Win10, MacOS 10.12, etc...)

What steps will reproduce the problem?
(1) SSH into Linux machine
(2) Try using ssh-add <key>
(3) Try to shh

What is the expected result?
For the SSH key to be forwarded back to the chromebook agent

What happens instead?
Get an error that says "could not add identity... agent refused operation"


Please use labels and text to provide additional information.

If this is a regression (i.e., worked before), please consider using the
bisect tool (https://www.chromium.org/developers/bisect-builds-py) to help
us identify the root cause and more rapidly triage the issue.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.