Auto-rebaseline for r176700

LayoutTests/fast/repaint/background-resize-width-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [8, 8, 600, 500],
-        [8, 8, 550, 500]
+        [558, 8, 50, 500]
       ],
       "children": [
         {
           "position": [8, 8],
           "bounds": [55, 40],
           "drawsContent": true,
           "backfaceVisibility": "hidden",
           "repaintRects": [
             [55, 0, 5, 40]
           ]
@@ skipping 202 matching lines @@
           "repaintRects": [
             [0, 0, 60, 40],
             [0, 0, 55, 40]
           ]
         }
       ]
     }
   ]
 }