Created attachment 388572 [details]
Patch

Created attachment 388577 [details]
Patch

Created attachment 388578 [details]
Patch

Created attachment 388660 [details]
Patch

Comment on attachment 388660 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=388660&action=review

> Source/WebCore/animation/AnimationTimeline.cpp:224
> +    for (size_t i = 0; i < cssAnimationList->size(); ++i) {
> +        if (cssAnimationList->animation(i) == backingAnimation) {
> +            auto newAnimationList = cssAnimationList->copy();
> +            newAnimationList->remove(i);
> +            keyframeEffectStack.setCSSAnimationList(WTFMove(newAnimationList));
> +            return;
> +        }
> +    }

Why don't you add a remove() to CSSAnimationList that accepts an Animation as a parameter? Is there a reason you don't want to edit the list in place?

(In reply to Dean Jackson from comment #5)
> Comment on attachment 388660 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=388660&action=review
> 
> > Source/WebCore/animation/AnimationTimeline.cpp:224
> > +    for (size_t i = 0; i < cssAnimationList->size(); ++i) {
> > +        if (cssAnimationList->animation(i) == backingAnimation) {
> > +            auto newAnimationList = cssAnimationList->copy();
> > +            newAnimationList->remove(i);
> > +            keyframeEffectStack.setCSSAnimationList(WTFMove(newAnimationList));
> > +            return;
> > +        }
> > +    }
> 
> Why don't you add a remove() to CSSAnimationList that accepts an Animation
> as a parameter? Is there a reason you don't want to edit the list in place?

Yes, it comes down from RenderStyle as const.

Committed r255076: <https://trac.webkit.org/changeset/255076>

<rdar://problem/58870279>