Re: [whatwg/streams] can streams be transferred via postMessage()? (#276)

> we build something on top of the current draft, by reestablishing the state with a special message whose contents are [[state]], [[storedError]], and maybe [[disturbed]]? I guess it gets a decent bit uglier if we also have to do [[queue]] and [[queueTotalSize]], but I think that'd be all of it...

We don't have the other end of the message port. It's still in the original realm. So our only communication channel is the |dataHolder|. Then add in the fact that there may be a message in transit from the original realm that's trying to change our state at the same time we're trying to clone it and the whole thing becomes very painful.

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