Enable slimming paint for fast/repaint

LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt

Index: LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt
diff --git a/LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt b/LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt
index e99ccdeb738bd2379c25882eee99414bc511483e..a4639fb30c6e323335c2b9d66bbffd640e8bd9f3 100644
--- a/LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt
+++ b/LayoutTests/platform/mac/fast/repaint/selection-clear-expected.txt
@@ -15,6 +15,29 @@
         [8, 49, 4, 18],
         [8, 8, 100, 200],
         [8, 8, 100, 100]
+      ],
+      "paintInvalidationClients": [
+        "LayoutBlockFlow HTML",
+        "InlineTextBox 'FAIL: Test did'",
+        "InlineTextBox 'not run'",
+        "LayoutText #text",
+        "RootInlineBox",
+        "RootInlineBox",
+        "LayoutBlockFlow HTML",
+        "LayoutBlockFlow BODY",
+        "LayoutBlockFlow DIV id='root'",
+        "LayoutBlockFlow DIV id='firstLine'",
+        "LayoutBlockFlow DIV id='firstLine'",
+        "LayoutText #text",
+        "InlineTextBox '\u00A0'",
+        "LayoutText #text",
+        "InlineTextBox '\u00A0'",
+        "LayoutBlockFlow (anonymous)",
+        "LayoutBlockFlow (anonymous)",
+        "LayoutBR BR",
+        "InlineTextBox '\n'",
+        "LayoutBR BR",
+        "InlineTextBox '\n'"
       ]
     }
   ]