Auto-rebaseline for r187090

LayoutTests/platform/mac/fast/repaint/bugzilla-6278-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [304, 126, 2, 183],
         [254, 126, 52, 215],
+        [252, 126, 50, 183],
         [250, 126, 36, 128],
+        [10, 309, 242, 32],
         [10, 291, 242, 50],
         [10, 259, 292, 50],
         [10, 254, 240, 32],
-        [10, 126, 292, 183],
         [10, 126, 292, 128],
-        [10, 126, 242, 215],
         [10, 126, 242, 160]
       ]
     }
   ]
 }