UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.86 Safari/537.36

Steps to reproduce the problem:
1. Create new tab.
2. Open Developer Tools > Network pane.
3. Open http://google.com.
4. Inspect the requests. 
5. Save HAR and inspect the output.

What is the expected behavior?

What went wrong?
In steps 4 and 5, it is unclear, which protocols were used.

Did this work before? N/A 

Chrome version: 50.0.2661.86  Channel: stable
OS Version: 
Flash Version: Shockwave Flash 21.0 r0

I also observe "httpVersion": "unknown" in the HAR.

Having this information clearly visible would have made debugging the problem described in  issue #607012  much simpler (initially a bug in the server was suspected, and it took a lot of debugging to pin it on the Chrome behavior, which was due to HTTP/2).