If a wheel event hits the non-fast-scrollable area, then we need to send the events with the correct "processing steps" to the web process so we know whether to run the scrolling logic.
<rdar://problem/103534392>
Pull request: https://github.com/WebKit/WebKit/pull/7883
Committed 258145@main (815e52db702d): <https://commits.webkit.org/258145@main> Reviewed commits have been landed. Closing PR #7883 and removing active labels.
Bug 249687 – [WinCairo] REGRESSION(258145@main) wheel events can't scroll the page