We hit ASSERT(m_timersWereStopped); in ~ScrollingEffectsController() because we never called ScrollingEffectsController::stopAllTimers()
Pull request: https://github.com/WebKit/WebKit/pull/3157
Committed 253269@main (657e5c2cc8f4): <https://commits.webkit.org/253269@main> Reviewed commits have been landed. Closing PR #3157 and removing active labels.
<rdar://problem/98404117>