Enable slimming paint for fast/repaint

LayoutTests/fast/repaint/reflection-redraw-expected.txt

Index: LayoutTests/fast/repaint/reflection-redraw-expected.txt
diff --git a/LayoutTests/fast/repaint/reflection-redraw-expected.txt b/LayoutTests/fast/repaint/reflection-redraw-expected.txt
index 559bb5be5ce0144b215405c0bc40453ea2037152..409eb33287b815148c330c0e0867372cfc4bc651 100644
--- a/LayoutTests/fast/repaint/reflection-redraw-expected.txt
+++ b/LayoutTests/fast/repaint/reflection-redraw-expected.txt
@@ -10,6 +10,28 @@
         [304, 377, 128, 156],
         [304, 21, 128, 208],
         [69, 267, 288, 72]
+      ],
+      "paintInvalidationClients": [
+        "LayoutText #text",
+        "InlineTextBox 'The color of this'",
+        "InlineTextBox 'text in the'",
+        "InlineTextBox 'reflection should be'",
+        "InlineTextBox 'green'",
+        "LayoutText #text",
+        "InlineTextBox 'The color of this'",
+        "InlineTextBox 'text in the'",
+        "InlineTextBox 'reflection should be'",
+        "InlineTextBox 'green'",
+        "LayoutText #text",
+        "InlineTextBox 'The color of this'",
+        "InlineTextBox 'text in the'",
+        "InlineTextBox 'reflection should be'",
+        "InlineTextBox 'green'",
+        "LayoutText #text",
+        "InlineTextBox 'The color of this'",
+        "InlineTextBox 'text in the'",
+        "InlineTextBox 'reflection should be'",
+        "InlineTextBox 'green'"
       ]
     }
   ]