[webkit-reviews] review requested: [Bug 100776] Avoid unnecessary style recalcs on class attribute mutation : [Attachment 171509] another try

[bugzilla-daemon at webkit.org]

Antti Koivisto <koivisto at iki.fi> has asked  for review:
Bug 100776: Avoid unnecessary style recalcs on class attribute mutation
https://bugs.webkit.org/show_bug.cgi?id=100776

Attachment 171509: another try
https://bugs.webkit.org/attachment.cgi?id=171509&action=review