Paint collapsed borders of a table as one display item

third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt

Index: third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt
diff --git a/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt b/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt
index 6a5f6dc003b0f5d80527c3aa97c7ce80715bb1e2..7b946e8fca45c0a30e3a49aee38261e6beaaf786 100644
--- a/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt
+++ b/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-cell-border-width-expected.txt
@@ -8,8 +8,8 @@
       "paintInvalidations": [
         {
           "object": "LayoutTable TABLE",
-          "rect": [8, 58, 114, 4],
-          "reason": "incremental"
+          "rect": [8, 8, 114, 54],
+          "reason": "forced by layout"
         },
         {
           "object": "LayoutTableCell TD id='foo'",
@@ -25,27 +25,14 @@
           "object": "LayoutTableCell TD",
           "rect": [62, 8, 55, 52],
           "reason": "bounds change"
-        },
-        {
-          "object": "LayoutTable TABLE",
-          "rect": [116, 8, 6, 54],
-          "reason": "incremental"
         }
       ]
     }
   ],
   "objectPaintInvalidations": [
     {
-      "object": "LayoutTableCell TD id='foo'",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
       "object": "LayoutTable TABLE",
-      "reason": "incremental"
+      "reason": "forced by layout"
     },
     {
       "object": "LayoutTableRow TR",