Justin Spahr-Summers a4ef7abebb Wait to clear RCTImageView.image until definitively removed from window
Summary: When `RCTImageView` is removed from the view hierarchy, it clears out its `image` to save memory. This makes sense, except that it gets removed from the window (view hierarchy) even when becoming the child of another view.

This fixes the logic so that it only clears out the image if the view hasn't been moved somewhere else within one frame.

@​public

Reviewed By: @javache

Differential Revision: D2493849
2015-09-30 09:40:30 -07:00
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