As part of the work on threaded animation resolution (see bug 250970), we will need to have the keyframe interpolation logic currently contained in `KeyframeEffect` also apply to `AcceleratedEffect`. This will require a fair amount of refactoring to move all the relevant code in a shared base class for both `KeyframeEffect` and `AcceleratedEffect`. The first step towards this goal is to have the keyframe class backing those animation effect classes, `KeyframeValue` and `AcceleratedEffectKeyframe`, use a shared base class.
Pull request: https://github.com/WebKit/WebKit/pull/20420
Committed 270648@main (893f4b23e527): <https://commits.webkit.org/270648@main> Reviewed commits have been landed. Closing PR #20420 and removing active labels.
<rdar://problem/118344599>