Roboto font in Chrome is not shown properly

I've been working for a client site and I have problem with rendering of Roboto font.

In Chrome (ver. 43.0.2357.65 m) all the various weights of Roboto looks same. Here is the example: Left is Mozilla Firefox, right is Chrome http://ift.tt/1LI9C94

Do you have any idea what's wrong with it?

thank you