incorrectly removing scrollbar height for auto height flexbox children
Created attachment 132343 [details] Patch
Comment on attachment 132343 [details] Patch Ojan gave me a better idea for the test to handle lion scrollbars (which have no size).
Created attachment 132348 [details] Patch
Created attachment 132349 [details] Patch
Committed r111053: <http://trac.webkit.org/changeset/111053>