UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2815.0 Safari/537.36

Example URL:

Steps to reproduce the problem:
while in linux, X11...

1. Select text from a webpage
2. try to paste with middle mouse button(MMB) (or LMB+RMB at the same time)  [not ctrl+v !]
3. 

What is the expected behavior?
the selected text was (automatically) copied upon selecting it and thus when MMB happens it would get pasted(eg. in shell)

What went wrong?
selected text does not get copied anymore(regression)
so, MMB pastes only whatever was in clipboard from before(if any) eg. whatever Ctrl+C copied 

Does it occur on multiple sites: N/A

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Does this work in other browsers? N/A 

Chrome version: 54.0.2815.0  Channel: n/a
OS Version: 
Flash Version: 

looks like the following commit removed this feature:
6f1786b887a51f3fcd3cdeacfd9b455934c570ca

Does not have this issue: chromium-dev 54.0.2804.0_r923.5f2924f-1 

then I upgraded to/has this issue:  54 .0.2814.0_r2922.7077c9c-1)