Summary:
Originally, we thought that skipping the measurement of views that were hidden would be a nice optimiatzion. Upon further review, we saw that according to Apple's `UIView` documentation:
> A hidden view disappears from its window and does not receive input events. It remains in its superview’s list of subviews, however, and participates in autoresizing as usual.
So, to keep parity with common iOS layout APIs, we are going to size and layout views, even if they are hidden.
Reviewed By: emilsjolander
Differential Revision: D4051225
fbshipit-source-id: 0794cbad293a7de83d109dad2b3983d83845d145
Summary: Wrote some tests to make sure the associated objects we use for layout live and die with the objects. This was worthwhile because it made me realize UIView+CSSLayout wasn't enabled to ARC. As a result, my tests were failing because they weren't explicitly deallocing nodes.
Reviewed By: rnystrom
Differential Revision: D4023324
fbshipit-source-id: 5356cf4f0522582d75f83b5eb2193d9bc8d63aee
Summary: If views are hidden on screen, we don't want to bother including them in layout calculations.
Reviewed By: rnystrom
Differential Revision: D4022992
fbshipit-source-id: 2e93eb911f26223f305ef7ce788f86d050b83e4a
Summary: I'm going to make some changes, but first, I want to get testing setup.
Reviewed By: rnystrom
Differential Revision: D4022585
fbshipit-source-id: a48516faad0bcb1a9cf5610ab21da5ee099c6f16
