Re: [streams] Initialize variables of ReadableStreamReader to the final value direc… (#373)

OK, this does not look so bad after I re-read it a few times. A lot of the "code bloat" comes from the `_resolve` and `_reject` members, which are just book-keeping devices.

If you are happy with this, then first please make sure that it parallels your ReadableByteStream PR---I kind of remember the ReadableByteStream having more factored-out functions? But I prefer fewer, so this looks pretty good. If they match up, then yeah, update the spec and rebase and I will merge.

---
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/streams/pull/373#issuecomment-118730952