Had the same problem after a bit of research I found the solution, won't work for long it seems.
https://support.google.com/chrome/answer/6213033 <--- Here is information about google disabling NPAPI plugins which I guess Battlelog is using, you can follow instructions and enable them, ufortunately till 45 version of google chrome is out.
For people who like to keep things easy here is what I did:
go to: chrome://flags/#enable-npapi
find: Enable NPAPI Mac, Windows Enable it
find: Enable support for WebRTC Stun origin header. Enable it
Works fine now.
