Enable slimming paint for fast/repaint

LayoutTests/virtual/slimmingpaint/fast/repaint/overflow-scroll-body-appear-expected.txt

Index: LayoutTests/virtual/slimmingpaint/fast/repaint/overflow-scroll-body-appear-expected.txt
diff --git a/LayoutTests/virtual/slimmingpaint/fast/repaint/overflow-scroll-body-appear-expected.txt b/LayoutTests/virtual/slimmingpaint/fast/repaint/overflow-scroll-body-appear-expected.txt
deleted file mode 100644
index 99322b4f674dc955582975aabda7b6b06d947ba5..0000000000000000000000000000000000000000
--- a/LayoutTests/virtual/slimmingpaint/fast/repaint/overflow-scroll-body-appear-expected.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-{
-  "bounds": [2008, 2092],
-  "children": [
-    {
-      "bounds": [2008, 2092],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "repaintRects": [
-        [8, 50, 784, 18],
-        [8, 50, 769, 18],
-        [8, 16, 2000, 2068],
-        [8, 16, 784, 18],
-        [8, 16, 769, 18],
-        [0, 0, 2008, 2092],
-        [0, 0, 785, 585]
-      ],
-      "paintInvalidationClients": [
-        "HorizontalScrollbar",
-        "HorizontalScrollbar",
-        "VerticalScrollbar",
-        "RootInlineBox",
-        "InlineTextBox 'You should see both vertical and horizontal scrollbars.'",
-        "RootInlineBox",
-        "InlineTextBox 'This is the test for '",
-        "InlineTextBox 'Bug 36461 - No vertical scrollbar after the CSS class change'",
-        "InlineTextBox '.'",
-        "LayoutView #document",
-        "LayoutView #document",
-        "LayoutBlockFlow BODY",
-        "LayoutBlockFlow P",
-        "LayoutBlockFlow P"
-      ]
-    }
-  ]
-}
-