The boilerplate that I used for all the callbacks-to-promises conversions works in almost every case, but the `ready()` method is a bit special because the callback name is `ready` instead of `success`. The `promiseToCallbacks` adapter handled this, but the call sites inside of the `ready` methods weren't testing for that callback name, so it wouldn't work properly when calling in the old style. Testing Done: Used an extension that called `ready()` on a draft review using the callbacks style instead of promises. Saw that it worked correctly.