Here's his counterfactual: "Sweden would not hesitate to pursue its sole announced concern, accepting the offer to interrogate Assange in London. It would declare that if Assange returned to Sweden (as he has agreed to do), he would not be extradited to Russia, where chances of a fair trial would be slight."
It doesn't seem to me that he's saying Sweden is in on it. Whether Chom thinks this or not, it still stands to reason that the politicians, in Sweden and the UK, who've been loudly talking about Assange's legal process, would also be saying things in his defence if he was being threatened by politicians and pundits in Russia or Iran.