Adjust visual overflow rect for rounded/shifted ascent/descent

third_party/WebKit/LayoutTests/platform/mac/paint/invalidation/svg/scrolling-embedded-svg-file-image-repaint-problem-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [1026, 1016],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow P",
           "rect": [24, 991, 737, 21],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
-          "rect": [177, 992, 202, 20],
+          "rect": [177, 991, 202, 22],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutText #text",
-          "rect": [432, 992, 176, 20],
+          "rect": [432, 991, 176, 22],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutInline A",
           "rect": [378, 987, 55, 29],
           "reason": "style change"
         }
       ]
     }
   ],
@@ skipping 50 matching lines @@
       "object": "LayoutText #text",
       "reason": "forced by layout"
     },
     {
       "object": "InlineTextBox '\u2192 script-handle-01-b'",
       "reason": "forced by layout"
     }
   ]
 }