Adjust visual overflow rect for rounded/shifted ascent/descent

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/transform-inline-layered-child-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) DIV id='box'",
@@ skipping 10 matching lines @@
           "rect": [100, 100, 100, 180],
           "reason": "subtree"
         },
         {
           "object": "LayoutInline (relative positioned) SPAN id='child'",
           "rect": [300, 300, 80, 179],
           "reason": "subtree"
         },
         {
           "object": "LayoutText #text",
-          "rect": [300, 302, 80, 176],
+          "rect": [300, 302, 80, 177],
           "reason": "subtree"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutBlockFlow (positioned) DIV id='box'",
       "reason": "subtree"
     },
@@ skipping 173 matching lines @@
       "object": "InlineTextBox 'Y Z'",
       "reason": "subtree"
     },
     {
       "object": "LayoutText #text",
       "reason": "subtree"
     }
   ]
 }