UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2688.0 Safari/537.36

Steps to reproduce the problem:
Demo URL: https://dl.dropboxusercontent.com/u/15217362/bugs/blackbox-worker/index.html

1. Open devtools
2. Go to sources tab, enable 'pause on exceptions' and 'pause on caught exceptions'
3. Reload the page
4. See that devtools breaks on the caught exception in worker.js
5. Right-click inside the worker.js source and click "Blackbox script"
6. Reload the page again
7. Devtools still breaks on the caught exception in worker.js. It even tells you the script is blackboxed at the top.

What is the expected behavior?
Blackboxed scripts in workers should not pause on exceptions.

What went wrong?
Blackboxed scripts in workers still pause on exceptions.

Did this work before? Yes A few releases ago?

Chrome version: 51.0.2688.0  Channel: canary
OS Version: 10.0
Flash Version: Shockwave Flash 21.0 r0