Auto-rebaseline for r189636

LayoutTests/platform/mac/compositing/overflow/text-match-highlight-expected.txt

 {
   "bounds": [800, 600],
   "children": [
     {
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
-        [282, 32, 46, 16],
-        [270, 48, 46, 16],
-        [225, 48, 46, 16],
-        [90, 48, 46, 16],
-        [52, 64, 46, 16],
-        [20, 204, 200, 72],
-        [10, 172, 139, 10],
-        [10, 118, 228, 16]
+        [282, 36, 46, 18],
+        [270, 54, 46, 18],
+        [225, 54, 46, 18],
+        [90, 54, 46, 18],
+        [52, 72, 46, 18],
+        [20, 214, 200, 72],
+        [10, 180, 139, 12],
+        [10, 126, 228, 18]
       ]
     }
   ]
 }