Yep, I remember it didn't work when we were debugging, but then when I was changing `$traceurRuntime.xxx` into `$traceurRuntime.type.xxx` I didn't realize `createMemberExpression` took multiple args and so I tried `parseExpression` and it worked. I mean, it works, at least for all my use cases.

Anyway. Fixed - changed to `createMemberExpression`.

Should I change https://github.com/google/traceur-compiler/pull/791/files#diff-7734695052f80baf97300a533474d989R207 too?