Enable slimming paint for fast/repaint

LayoutTests/platform/win/virtual/slimmingpaint/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt

Index: LayoutTests/platform/win/virtual/slimmingpaint/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt
diff --git a/LayoutTests/platform/win/virtual/slimmingpaint/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt b/LayoutTests/platform/win/virtual/slimmingpaint/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt
deleted file mode 100644
index c1cac73eec0e21574c45d9072af57a637d942a5f..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/win/virtual/slimmingpaint/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-{
-  "bounds": [785, 2350],
-  "children": [
-    {
-      "bounds": [785, 2350],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "repaintRects": [
-        [8, 2197, 777, 106],
-        [8, 2197, 653, 106],
-        [8, 2047, 777, 106],
-        [8, 2047, 774, 106],
-        [8, 2000, 777, 350]
-      ],
-      "paintInvalidationClients": [
-        "LayoutBlockFlow DIV id='container'",
-        "LayoutBlockFlow (positioned) DIV id='absolute'",
-        "LayoutBlockFlow P",
-        "LayoutText #text",
-        "InlineTextBox 'This test checks that switching opacity'",
-        "InlineTextBox 'invalidates the full subtree.'",
-        "LayoutBlockFlow P",
-        "LayoutText #text",
-        "InlineTextBox 'This text should be visible in the'",
-        "InlineTextBox 'output.'",
-        "LayoutBlockFlow DIV id='container'"
-      ]
-    }
-  ]
-}
-