UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/49.0.2623.108 Chrome/49.0.2623.108 Safari/537.36

Steps to reproduce the problem:
1. Open Chromium
2. Change the system (ie, outside of Chrome, in Ubuntu) scaling to or from high density scaling (not sure what the correct terminology is here).

What is the expected behavior?
Chromium should detect that the scaling has changed, and change its scaling settings.

What went wrong?
Chromium does not change the scaling of the mouse cursor, if you switch from 2x scaling to regular, you end up with a massive mouse cursor, or the other way around, with a tiny mouse cursor.  Note that this does NOT affect the browser window or anything in it, web pages, menus, tabs, icons etc are all rescaled when the system scaling changes, it's only the mouse cursor that rescale.

Did this work before? No 

Chrome version: 49.0.2623.108  Channel: stable
OS Version: Ubuntu 15.10
Flash Version: Shockwave Flash 11.2 r999

Not sure if I have the terminology right in this bug report, but to explain my use case, I have a laptop with a high density display (13" 3200x1800), and an external monitor with a low density display (27" 1980x1080), and I switch between these frequently (I don't use them at the same time).  When I switch, Ubuntu detects the switch and changes the system scaling settings, and Chromium detects this fine and rescales the Window and Window contents, but no the mouse cursor.  Restarting Chromium is the only way I've found to fix the problem.