UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36

Steps to reproduce the problem:
 Issue 369938  disabled (some kind of) the overscroll effect. However, overscroll effects have consequences on scrollTop and similar and can sometimes lead to problems that need to be debugged. Disabling this altogether means that a real device must be used in order to debug overscroll related bugs.
Bonus points for having the bounce/springish behavior emulated as well, if it is not part of the overscroll effect already.

What is the expected behavior?
The bounce/springish/overscroll effects are emulated according to a setting.

What went wrong?
The bounce/springish/overscroll effects are not emulated at all.

Did this work before? N/A 

Chrome version: 64.0.3282.140  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: