Created attachment 388549 [details]
Patch

Comment on attachment 388549 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=388549&action=review

> Source/WebCore/platform/animation/AnimationList.cpp:36
> +AnimationList::AnimationList()

You can say  = default

> Source/WebCore/platform/animation/AnimationList.h:34
> +class AnimationList : public RefCounted<AnimationList> {

You still want WTF_MAKE_FAST_ALLOCATED or one of its variants.

> Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp:152
> -    , animations(o.animations ? makeUnique<AnimationList>(*o.animations) : nullptr)
> -    , transitions(o.transitions ? makeUnique<AnimationList>(*o.transitions) : nullptr)
> +    , animations(o.animations)
> +    , transitions(o.transitions)

This no longer copies

Created attachment 388558 [details]
Patch

> > Source/WebCore/platform/animation/AnimationList.h:34
> > +class AnimationList : public RefCounted<AnimationList> {
> 
> You still want WTF_MAKE_FAST_ALLOCATED or one of its variants.

No need, RefCounted is WTF_MAKE_FAST_ALLOCATED.

Comment on attachment 388558 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=388558&action=review

> Source/WebCore/platform/animation/AnimationList.h:38
> +    static Ref<AnimationList> create(const AnimationList& other) { return adoptRef(*new AnimationList(other)); }

copy() member function would be nicer.

(In reply to Antti Koivisto from comment #5)
> Comment on attachment 388558 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=388558&action=review
> 
> > Source/WebCore/platform/animation/AnimationList.h:38
> > +    static Ref<AnimationList> create(const AnimationList& other) { return adoptRef(*new AnimationList(other)); }
> 
> copy() member function would be nicer.

Will fix in commit, thanks.

https://trac.webkit.org/changeset/254991

<rdar://problem/58841851>