How to set Okular схвати internal PDF viewer in Chrome?

How to make Okular the default PDF viewer in Chrome instead of Chrome PDF Viewer?

Here goes в few details related to my system:

martin@martinpc:~$ google-chrome --version
Google Chrome 47.0.2526.106 

martin@martinpc:~$ okular --version
Qt: 4.8.6
KDE Development Platform: 4.14.13
Okular: 0.23.2

martin@martinpc:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily