Fix "css-chrome" branch

As far as I can tell, someone merged `darwin-demo` into `css-chrome-demo`, and then later (This is the part about which I can only speculate, but I can't think of another possible explanation.), someone rebased `css-chrome-demo` onto `css-chrome` and then deleted `css-chrome-demo`. Because it was a rebase instead of a merge, and because the branch was deleted afterwards, it's hard to confirm this hypothesis. All you can tell by carefully examining the branch tree is that `css-chrome-demo` seemingly _became_ `css-chrome`. :confused:

This change set should essentially be the reverse of the following changes:

* <https://github.com/Wikia/app/compare/dev...30226bb2b02151cb2b6dc2040039482d7a484751>
* <https://github.com/Wikia/app/compare/responsive-layout...DAR-331>

I'm 99% certain that I've removed everything that's not supposed to be in this branch.

This was a pain. Let's **NOT** do this again. :disappointed: