Minister Baird has made it very clear that accountability for the crimes committed in Syria against the civilian population need to be accounted for and that the perpetrators need to be brought to justice.
Now, how that works in practice.... You said very correctly that Syria is not a party to the Rome Statute. However, the situation is contemplated in the Rome Statute. The Security Council would have the power to refer the situation in Syria, as they did with the situation in Libya, to the ICC and to the prosecutor for consideration, so that is an option. Whether or not that will happen is obviously a matter for the Security Council to determine.
The other alternative, of course, is that individual countries such as Canada have on their books legislation that permits prosecution for war crimes committed extraterritorially. Should Mr. Assad find himself in Britain or in Canada, for example, a jurisdiction could be taken by individual states, so that is a possibility. It's probably not a likely possibility, but it is out there.