- Do not resolve raw headers upon `loadingFinished`, since they may still come later in
`responseReceivedExtraInfo`.
- Introduce separate promises for `encodedBodySize`, `transferSize` and `responseHeadersSize`.
- Make sure we resolve each of them either with data available
from the browser, or a fallback calculation.
- Set raw response headers for redirects on WebKit.
- Do not stall on cached responses in Chromium, they have erroneously set `hasExtraInfo` flag.
- Use `transferSize` that is available in Firefox protocol.
fix(network): make allHeaders wait until all header are available
Before, calling `allHeaders()` from `page.on('request')` would yield
provisional headers instead.
With these changes:
- In Firefox, all headers are available immediately.
- In Chromium, all headers are available upon requestWillBeSentExtraInfo.
- In WebKit, all headers are available upon responseReceived.
- In all browsers, intercepted requests use "provisional" headers
as all headers, since there is no network stack to change the headers.
Drive-by: migrated Chromium to `hasExtraInfo` flags that simplifies
the logic quite a bit.
