Enable slimming paint for fast/repaint

LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/repaint-composited-child-in-scrolled-container-expected.txt

Index: LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/repaint-composited-child-in-scrolled-container-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/repaint-composited-child-in-scrolled-container-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/repaint-composited-child-in-scrolled-container-expected.txt
deleted file mode 100644
index f02d0f1a7481bf18d490078c13638bee1f9a90ab..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/repaint-composited-child-in-scrolled-container-expected.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-  "bounds": [800, 600],
-  "children": [
-    {
-      "bounds": [800, 600],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "repaintRects": [
-        [230, 293, 63, 15],
-        [168, 293, 125, 15],
-        [8, 293, 222, 15]
-      ],
-      "paintInvalidationClients": [
-        "HorizontalScrollbar",
-        "HorizontalScrollbar",
-        "HorizontalScrollbar"
-      ],
-      "children": [
-        {
-          "position": [8, 8],
-          "bounds": [285, 285],
-          "shouldFlattenTransform": false,
-          "children": [
-            {
-              "position": [-315, 0],
-              "bounds": [600, 600],
-              "contentsOpaque": true,
-              "drawsContent": true,
-              "backgroundColor": "#FF0000",
-              "repaintRects": [
-                [0, 0, 600, 600]
-              ],
-              "paintInvalidationClients": [
-                "LayoutBlockFlow DIV id='inner'"
-              ]
-            }
-          ]
-        }
-      ]
-    }
-  ]
-}
-