Add in row offset if self-composited.

third_party/WebKit/LayoutTests/paint/invalidation/invalidate-cell-in-row-with-offset-expected.txt

 {
   "name": "Content Root Layer",
   "bounds": [800, 600],
   "children": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "children": [
         {
           "name": "LayoutTableRow TR",
-          "position": [8, 8],
-          "bounds": [69, 23],
+          "position": [8, 18],
+          "bounds": [234, 0],
           "drawsContent": true,
-          "backgroundColor": "#FF0000",
+          "backgroundColor": "#0000FF"
+        },
+        {
+          "name": "LayoutTableRow TR",
+          "position": [8, 28],
+          "bounds": [234, 102],
+          "drawsContent": true,
+          "backgroundColor": "#0000FF"
+        },
+        {
+          "name": "LayoutTableRow TR class='shadow-inset'",
+          "position": [8, 140],
+          "bounds": [234, 102],
+          "drawsContent": true,
+          "backgroundColor": "#0000FF",
           "paintInvalidations": [
             {
               "object": "LayoutTableCell TD id='target'",
-              "rect": [0, 0, 35, 24],
+              "rect": [10, 0, 102, 102],
               "reason": "style change"
             }
           ]
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
       "object": "LayoutTableCell TD id='target'",
       "reason": "style change"
-    },
-    {
-      "object": "RootInlineBox",
-      "reason": "style change"
     }
   ]
 }