[Webkit-unassigned] [Bug 193754] Allow scrolling tree nodes to exist in a detached state

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193754

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
This is really a consequence of scrolling tree nodes being hidden behind the ScrollingCoordinator interface; a client can't hang on to a scrolling tree node; all it has to hang onto is a ScrollingNodeID.

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