This tests verifies the hit test regions given to the compositor specifically for continuation case. It can only be run in DumpRenderTree.
continuation: layer(0,0 800x600) has hit test rect (13,79 101x11)
continuation: layer(0,0 800x600) has hit test rect (13,90 290x12)
continuation: layer(0,0 800x600) has hit test rect (13,102 121x11)