@Reporter: This is likely due to a buggy antivirus, firewall, or proxy on your machine or network. Are running Kasperksy antivirus? If so, does it work if you disable it, specifically the "Scan encrypted connections" setting? It seems they recently shipped a bad update and broke stuff.

It would also help us to get a NetLog of what occurred if you can reproduce it, see details here:
https://sites.google.com/a/chromium.org/dev/for-testers/providing-network-details. CC'ing Dev for further inputs on it. 

Kaspersky recently released a patch to fix their update. If you are still experiencing the issue, please try updating your Kaspersky AV install.

If you aren't using Kaspersky or the problem remains after the update, please let us know the previously requested information.

Otherwise, we'll close this bug in a couple days, feel free to file a new bug if you continue experiencing issues after the bug gets closed.