Do not use undefined default parameter value in CSSStyleDeclaration.idl, instead use no explicit default parameter at all. This means a zero length String will be used, which will be more efficient when using the cssPropertyID helper method, as well as less error-prone.
Created attachment 407054 [details] Patch
Comment on attachment 407054 [details] Patch Could we have added a tests? Or is there no way to detect that we are failing to look up "undefined" vs. failing to look up a null string?
(In reply to Darin Adler from comment #2) > Comment on attachment 407054 [details] > Patch > > Could we have added a tests? Or is there no way to detect that we are > failing to look up "undefined" vs. failing to look up a null string? I think the only way is through timing both lookups, and asserting that the null string lookup (early exit) will take less time than looking up "undefined". I personally thing this is a bit overkill but let me know if you want me to add such a test.
Committed r266046: <https://trac.webkit.org/changeset/266046> All reviewed patches have been landed. Closing bug and clearing flags on attachment 407054 [details].
<rdar://problem/67640590>