UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Steps to reproduce the problem:
Reproduced using Windows 10 and a debugger:

1. In chromium, ITrayNotifyWin8::UnregisterCallback has a prototype accepting unsigned long *

2. Calling this function as provided appears to fail, leaving the previously-set INotificationCB with refcount=3 (i.e. it leaks)

3. If the API is called with "unsigned long" (passing the handle directly, rather than the pointer), the INotificationCB is properly released.

What is the expected behavior?
Unregister would deallocate all resources

What went wrong?
API prototype for "Unregister" should take an unsigned long and not a pointer.

Have not regressed on Windows 8.

Did this work before? No 

Chrome version: 57.0.2987.133  Channel: n/a
OS Version: 10.0
Flash Version: 

This does not apply to the Win7 "legacy" code.