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layer at (0,0) size 800x600
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          text run at (0,0) width 744: "This test ensures selection that crosses the shadow DOM boundary of a readonly input element cannot be made by a"
          text run at (0,18) width 79: "mouse drag."
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          text run at (0,0) width 767: "To manually test, select text by a mouse drag starting in \"world\" and ending in \"hello\". Selection should not extend into"
          text run at (0,18) width 116: "the input element."
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        RenderTextControl {INPUT} at (0,0) size 58.08x24 [bgcolor=#FFFFFF] [border: (2px inset #EEEEEE)]
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            text run at (62,3) width 38: "world"
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    RenderText {#text} at (0,0) size 34x17
      text run at (0,0) width 34: "hello"
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selection end:   position 2 of child 0 {#text} of child 3 {SPAN} of child 5 {DIV} of body