We show a white box first and then fade in the content. The initial white box is not what we want. https://docs.google.com/open?id=0BwRi59l_ri74d1VjNTdyWGlwcUk
Created attachment 157955 [details] Patch
Comment on attachment 157955 [details] Patch I hope a popup window itself supports opacity transition, or smooth size transition.
Comment on attachment 157955 [details] Patch Clearing flags on attachment: 157955 Committed r125507: <http://trac.webkit.org/changeset/125507>
All reviewed patches have been landed. Closing bug.
fast/forms/date/calendar-picker-appearance.html uses webktiTransitionEnd event. Would you update the test please?