before routing admission: accepted
listener generation increased: true
after routing admission: blocking wheel event listeners
display list:
AccumulatedVisualContext Tree:
  [1] scroll_frame_id=1 (PaintableWithLines(BlockContainer<PRE>#out))

DisplayList:
SaveLayer@0
  CompositorWheelHitTestTarget@0 target_scroll_frame_index=1 rect=[0,0 800x600]
  CompositorScrollNode@0 scroll_frame_index=1 parent_scroll_frame_index=0 scrollport_rect=[0,0 800x600] max_scroll_offset=[0,1413] is_viewport=true
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=1 rect=[0,0 800x2013]
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=1 rect=[0,0 800x2000]
  CompositorWheelHitTestTarget@1 target_scroll_frame_index=1 rect=[0,0 800x2000]
Restore@0
