Andrei Coman 922cd6ddfc Fix Modal freeze ...

Summary:
In some cases, the size of the content view changes before we add views to the
Modal. That means that the size of that view will not be set through the
`onSizeChanged` method. This can result in some apps apparently freezing,
since the dialog is created, but there are no actual views in it.
For that reason, we still need the ModalHostShadowNode to set the size of the
initial view, so that by the time the view gets added it already has the correct
size.
There's a new helper class so that we can reuse the modal size computation.

Reviewed By: foghina

Differential Revision: D3892795

fbshipit-source-id: 6a32bd7680a74d9912a21bfebb4ebd7a3c3c3e38

2016-09-20 06:58:49 -07:00

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Fix Modal freeze

2016-09-20 06:58:49 -07:00