Enable slimming paint for fast/repaint

LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/text-append-dirty-lines-expected.txt

Index: LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/text-append-dirty-lines-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/text-append-dirty-lines-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/text-append-dirty-lines-expected.txt
deleted file mode 100644
index 2713734c76514a0c4969b4a896f3500848a5fe98..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/mac/virtual/slimmingpaint/fast/repaint/text-append-dirty-lines-expected.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "bounds": [800, 600],
-  "children": [
-    {
-      "bounds": [800, 600],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "repaintRects": [
-        [8, 132, 784, 36],
-        [8, 42, 775, 126]
-      ],
-      "paintInvalidationClients": [
-        "InlineTextBox 'sagittis aliquam nunc. Nullam pharetra molestie eros. Donec tempus purus ut ligula. Phasellus non nisl. Etiam eu mauris.'",
-        "RootInlineBox",
-        "InlineTextBox 'Curabitur a velit'",
-        "RootInlineBox",
-        "LayoutBlockFlow P id='target'",
-        "LayoutText #text",
-        "InlineTextBox 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse placerat. Morbi tristique. Mauris eu lacus sed felis'",
-        "InlineTextBox 'pellentesque cursus. Proin vitae nulla. Vivamus in ipsum. Etiam mi. Nam malesuada purus in sem. Sed eget elit vel erat'",
-        "InlineTextBox 'laoreet feugiat. Phasellus mollis pulvinar mi. Etiam ut neque sed eros egestas laoreet. Vestibulum ullamcorper, nulla non'",
-        "InlineTextBox 'feugiat molestie, mi lorem bibendum leo, ac gravida orci nunc nec nulla. Nunc nunc lorem, rhoncus et, rutrum ac,'",
-        "InlineTextBox 'fermentum ut, tortor. Sed rhoncus. Quisque enim metus, luctus tincidunt, vestibulum eu, vestibulum eu, libero. Mauris'",
-        "InlineTextBox 'sagittis aliquam nunc. Nullam pharetra molestie eros. Donec tempus purus ut ligula. Phasellus non nisl. Etiam eu mauris.'",
-        "InlineTextBox 'Curabitur a velit.'"
-      ]
-    }
-  ]
-}
-