Summary: If a node has a global negative offset (e.g from a view pager) its position will be outside of the visualizors bounds and could potentially be where the tree is. The user doesnt see the wireframes since overflow hidden is on the parent node. A situation can arise where when the mouse is over the tree the hit test returns an offscreen node and causes us to hover a random node rather than the tree node hover effect taking place. We are just adding a guard to say if the mouse is outside the dom rect for the root visualization node than dont run the hit test
Reviewed By: lblasa
Differential Revision: D41493001
fbshipit-source-id: ea7974de7f2b80126d52490526a21e2a3b487d3d
32fe3948d9