Fixed.
For developers having same issue:
Chrome "25.0.1364.99" do not accept sdp with
"audio.a.ssrc.label==video.a.ssrc.label" while canary "27.0.1423.0"
does.
[
m=audio 64082 RTP/SAVPF 3 8 101
a=ssrc:416662281 label:Doubango.Audio <--
...
m=video 64084 RTP/SAVPF 100 104 105
a=ssrc:416672225 label:Doubango.Video <--
...
]