{
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      "name": "LayoutView #document",
      "bounds": [800, 600],
      "drawsContent": false,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "Scrolling Layer",
      "bounds": [800, 600],
      "drawsContent": false
    },
    {
      "name": "Scrolling Contents Layer",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF",
      "paintInvalidations": [
        {
          "object": "LayoutBlockFlow DIV id='child'",
          "rect": [9, 9, 100, 100],
          "reason": "disappeared"
        },
        {
          "object": "LayoutBlockFlow DIV id='target'",
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          "reason": "chunk appeared"
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      ]
    },
    {
      "name": "LayoutBlockFlow (positioned) DIV",
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      "drawsContent": false
    }
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}