Auto-rebaseline for r197368

LayoutTests/platform/mac-mavericks/compositing/overflow/updating-scrolling-content-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "children": [
         {
           "position": [8, 8],
@@ skipping 50 matching lines @@
                 }
               ]
             }
           ]
         }
       ]
     }
   ]
 }