UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Example URL:
http://jsfiddle.net/AlexLukin/rktvybb0/7/

Steps to reproduce the problem:
1. Open this JSFiddle: http://jsfiddle.net/AlexLukin/rktvybb0/7/
2. Click on the orange div.

What is the expected behavior?
After click on orange div #c green div #b should loose its scroll bar and orange div #c should stretch to fill 100% of parent div #b.

What went wrong?
Orange div #c preserves its old width and part of green div #b becomes visible.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 52.0.2743.116  Channel: n/a
OS Version: 10.0
Flash Version: Shockwave Flash 22.0 r0