Code review comment for lp:~aacid/unity8/new_tabbar

 * Did you perform an exploratory manual test run of the code change and any related functionality?

Yes

 * Did CI run pass? If not, please explain why.
errors in before_settle, after_settle and networking, see http://paste.ubuntu.com/7204822/

before_settle and after_settle always failed on my device.
networking is not touched here so I think it is also not related to the MR.