Paint collapsed borders of a table as one display item

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

Index: third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-colgroup-border-width-expected.txt
diff --git a/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-colgroup-border-width-expected.txt b/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-colgroup-border-width-expected.txt
index 7f1d98f2219c01a932501e4870f2c85688904552..d83e8b97e091c3caf13573709304ce669b19db7d 100644
--- a/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-colgroup-border-width-expected.txt
+++ b/third_party/WebKit/LayoutTests/paint/invalidation/table/cached-change-colgroup-border-width-expected.txt
@@ -7,6 +7,11 @@
       "drawsContent": true,
       "paintInvalidations": [
         {
+          "object": "LayoutTable TABLE",
+          "rect": [7, 7, 167, 104],
+          "reason": "invalidate paint rectangle"
+        },
+        {
           "object": "LayoutTableCol COLGROUP id='colgroup'",
           "rect": [8, 8, 166, 102],
           "reason": "style change"
@@ -71,28 +76,8 @@
   ],
   "objectPaintInvalidations": [
     {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
-    },
-    {
-      "object": "LayoutTableCell TD",
-      "reason": "style change"
+      "object": "LayoutTable TABLE",
+      "reason": "invalidate paint rectangle"
     },
     {
       "object": "LayoutTable TABLE",