third_party/blink/web_tests/flag-specific/enable-blink-features=CompositeAfterPaint/compositing/squashing/repaint-child-of-squashed-expected.txt

CASE 1, original layer tree
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='composited box behind'",
      "position": [50, 50],
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#0000FF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='box top'",
      "position": [130, 130],
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#00FFFF"
    }
  ]
}

CASE 2, change color of "inner" to red
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='composited box behind'",
      "position": [50, 50],
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#0000FF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV class='box top'",
      "position": [130, 130],
      "bounds": [100, 100],
      "contentsOpaque": true,
      "backgroundColor": "#00FFFF",
      "paintInvalidations": [
        {
          "object": "LayoutNGBlockFlow (positioned) DIV id='inner'",
          "rect": [10, 10, 50, 50],
          "reason": "background"
        }
      ]
    }
  ]
}