Code review comment for lp:~mardy/signon-keyring-extension/lp1172710

This has lagged too long and now has conflicts. The autolanding failure was due to parts of the stack pulling in qt4 deps, which has since been resolved. I've cleaned up the conflicts and resubmitted at https://code.launchpad.net/~ken-vandine/signon-keyring-extension/0.5.1/+merge/167074