Michael Schneider 611894329a [ASStackLayoutSpec] Performance improvements (#2470)
* Initial commit for ASStackLayoutSpec improvements

* Remove the lock in ASStackLayoutSpec and make the ASStackLayoutSpecStyle const

I think we don't need lock here as the style already has a lock while we set the value

* Add ASStackLayoutSpecItem  that replaces layout specific items

* Prevent baseline pass if not needed

* Update comments
2016-10-30 12:07:18 -07:00
..
2016-10-26 11:43:14 -07:00