Auto-rebaseline for r182920

LayoutTests/platform/mac/svg/repaint/text-mask-update-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [10, 32, 44, 23],
-        [10, 32, 44, 18],
-        [10, 32, 44, 18],
-        [10, 2, 47, 23],
-        [10, 2, 47, 23],
-        [10, 2, 47, 23]
+        [10, 35, 45, 20],
+        [10, 35, 45, 15],
+        [10, 35, 45, 15],
+        [10, 5, 48, 20],
+        [10, 5, 48, 20],
+        [10, 5, 48, 20]
       ]
     }
   ]
 }