Test CSS clip with composited layers. Left and right sides should look the same.

{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='composited box'",
      "position": [-5, -5],
      "bounds": [110, 110],
      "backgroundColor": "#666666",
      "transform": 2
    },
    {
      "name": "LayoutNGBlockFlow (relative positioned) DIV class='composited inner'",
      "bounds": [120, 120],
      "backgroundColor": "#00000033",
      "transform": 4
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [20, 20, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [0, 0, 1, 1]
      ]
    },
    {
      "id": 3,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [210, 10, 0, 1]
      ]
    },
    {
      "id": 4,
      "parent": 3,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [0, 0, 1, 1]
      ]
    }
  ]
}