[Webkit-unassigned] [Bug 203018] Surround all the wheel event code with HAS(WHEEL_EVENTS)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203018

--- Comment #2 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
We also have some:
#if !PLATFORM(IOS_FAMILY)
        needsTraverseDescendants |= document().hasWheelEventHandlers();
#endif

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