Re: [whatwg/dom] Specify that AbortController#abort() be bound to AbortController instance (#981)

> Do you find you need to "break out" with the `Promise` constructor as well?

Very occasionally, but not often. The last time I remember doing it was to do the "abort the current operation in favour of a new operation" pattern before we had `AbortController`:

```js
let currentJob = Promise.resolve();
let currentReject;

function showSearchResults(input) {
  if (currentReject) currentReject(new DOMException('', 'AbortError'));
  const abortPromise = new Promise((_, reject) => {
    currentReject = reject;
  });

  return currentJob = currentJob.catch(() => {}).then(() => {
    return Promise.race([
      abortPromise,
      Promise.resolve().then(async () => {
        // …do stuff…
      }),
    ]);
  });
}
```

But I've since rewritten that code to just use `AbortController`.

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