Calculate paint invalidation rect for scrollbars

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt

Index: third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt b/third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt
index 38ec21f50378c2db8e626cbbd2ab60f32ef8e677..72c6d6b23ae8b591186f30fdde8ad08aed2898c5 100644
--- a/third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt
+++ b/third_party/WebKit/LayoutTests/platform/linux/fast/repaint/overflow-scroll-body-appear-expected.txt
@@ -6,6 +6,7 @@
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
+        [785, 585, 15, 15],
         [8, 52, 784, 20],
         [8, 52, 769, 20],
         [8, 16, 2000, 2072],
@@ -15,9 +16,6 @@
         [0, 0, 785, 585]
       ],
       "paintInvalidationClients": [
-        "HorizontalScrollbar",
-        "HorizontalScrollbar",
-        "VerticalScrollbar",
         "RootInlineBox",
         "InlineTextBox 'You should see both vertical and horizontal scrollbars.'",
         "RootInlineBox",
@@ -28,7 +26,9 @@
         "LayoutView #document",
         "LayoutBlockFlow BODY",
         "LayoutBlockFlow P",
-        "LayoutBlockFlow P"
+        "LayoutBlockFlow P",
+        "HorizontalScrollbar",
+        "VerticalScrollbar"
       ]
     }
   ]