[Webkit-unassigned] [Bug 221067] Page scrolling by wheel events doesn't work in non-AC mode pages if async scrolling is enabled (WinCairo)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221067

--- Comment #4 from Fujii Hironori <Hironori.Fujii at sony.com> ---
setForceCompositingMode
|       setThreadedScrollingEnabled
|       |
v       v
true   true   : Good (Mac, GTK, WPE)
false  false  : Good (GTK)
false  true   : Bad  (WinCairo)

It seems that WinCairo should align with other ports.

There are WKPreferencesSetAcceleratedCompositingEnabled and WKPreferencesSetThreadedScrollingEnabled.
However, no API corresponding to setForceCompositingMode.

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