Auto-rebaseline for r177724

LayoutTests/platform/linux/fast/repaint/subtree-root-skipped-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [10, 11, 149, 16],
         [8, 298, 10, 10],
-        [8, 288, 10, 20],
-        [8, 8, 200, 22]
+        [8, 288, 10, 20]
       ]
     }
   ]
 }