I was dissapointed that the article didn't get into any details about the HTTP-level differences, but I think that's basically because they didn't need to know or care about the transport at that level since they were using Google's "cronet" library to dispatch the requests, and Google Cloud Load balancers as the QUIC termination point, so nothing on their ends actually deals with the neccessary differences from HTTP/2.
I was dissapointed that the article didn't get into any details about the HTTP-level differences, but I think that's basically because they didn't need to know or care about the transport at that level since they were using Google's "cronet" library to dispatch the requests, and Google Cloud Load balancers as the QUIC termination point, so nothing on their ends actually deals with the neccessary differences from HTTP/2.