UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36

Steps to reproduce the problem:
1. Create new Path2D() object. (var path = new Path2D())
2. Merge 2 paths using addPath function. (path.addPath(new Path2D()))

What is the expected behavior?
Path should have merged, optionaly transformed during process.

What went wrong?
addPath method is not implemented

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 63-64  Channel: stable
OS Version: 10.0
Flash Version: 

This was known to be working for a while.