Summary: @public There are some properties that we want to handle on a View level, as opposed to a FlatShadowNode level. For example, scale or alpha, that can be done very efficiently in hardware. Once we pop FlatShadowNode to a separate View, we need to apply these properties. This is where `BaseViewManager` comes in handy.
Reviewed By: sriramramani
Differential Revision: D2694290
Summary: @public This diff adds a `FlatShadowNode.forceMountToView()` method that will render its contents in it own `View`.
Reviewed By: sriramramani
Differential Revision: D2564502
Denis Koroskin