The only case when the containing block width might not be available is when computing the preferred width. Let's just pass in a 0 value in those cases instead of dealing with the optional cases.
<rdar://problem/55383153>
Created attachment 378825 [details] Patch
Comment on attachment 378825 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=378825&action=review > Source/WebCore/ChangeLog:9 > + The caller can always make a more informative decision about the default value when the continaing block width is not available. Typo 'continaing'
Created attachment 378864 [details] Patch
Comment on attachment 378864 [details] Patch Clearing flags on attachment: 378864 Committed r249903: <https://trac.webkit.org/changeset/249903>
All reviewed patches have been landed. Closing bug.