UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.75 Safari/537.36

Steps to reproduce the problem:
1. Just downloaded Chrome 52 Beta
2. opened it

What is the expected behavior?
The basic window GUI elements, that is, window border, title bar, and maximize/minimize/close buttons, should follow the native operating system's standards

What went wrong?
The window has a very thick border, unlike every other window on my system, and the window controls (close, minimize, maximize) are on the right instead of on the left and have different icons than every other application. It looks like they are kind of emulating Microsoft Windows', or like they are from some other window manager other than the one installed on my system.

If this is by design, this is demential.

Did this work before? N/A 

Chrome version: 52.0.2743.75  Channel: beta
OS Version: 
Flash Version: Shockwave Flash 22.0 r0

Screenshot 1: Chrome 52 beta (broken)
Screenshot 1: Chrome 51 stable (expected)
 

Deleted: Screenshot from 2016-07-18 21-35-12.png 48.2 KB

	Screenshot from 2016-07-18 21-35-12.png 48.2 KB View Download

Deleted: Screenshot from 2016-07-18 21-36-11.png 53.0 KB

	Screenshot from 2016-07-18 21-36-11.png 53.0 KB View Download