Fix Border collapsing with colpsan / rowspan cells

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/bugzilla-6278-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
+          "object": "LayoutTableSection TBODY",
+          "rect": [8, 355, 300, 40],
+          "reason": "incremental"
+        },
+        {
           "object": "LayoutBlockFlow DIV",
           "rect": [10, 138, 292, 160],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutBlockFlow DIV",
           "rect": [10, 303, 292, 50],
           "reason": "bounds change"
         },
         {
@@ skipping 24 matching lines @@
         {
           "object": "LayoutTableCell TD id='col1'",
           "rect": [252, 138, 50, 215],
           "reason": "incremental"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
+      "object": "LayoutTableSection TBODY",
+      "reason": "incremental"
+    },
+    {
       "object": "LayoutTableCell TD id='col1'",
       "reason": "incremental"
     },
     {
       "object": "LayoutBlockFlow DIV",
       "reason": "forced by layout"
     },
     {
       "object": "RootInlineBox",
       "reason": "forced by layout"
@@ skipping 46 matching lines @@
       "object": "LayoutBlockFlow DIV",
       "reason": "bounds change"
     },
     {
       "object": "LayoutTableCell TD id='target'",
       "reason": "bounds change"
     }
   ]
 }