Revert of Paint collapsed borders of a table as one display item

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

Index: third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
index 8756306ee433056fc3d6e475a40672de6e7f1741..9982e8a03fa82f724ad7bf3b25c33e0bfe9c0ef2 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -214,8 +214,11 @@
     context.paintingLayer->setNeedsPaintPhaseDescendantBlockBackgrounds();
   }
 
-  if (object.isTable() && toLayoutTable(object).hasCollapsedBorders())
-    context.paintingLayer->setNeedsPaintPhaseDescendantBlockBackgrounds();
+  if (object.isTable()) {
+    const LayoutTable& table = toLayoutTable(object);
+    if (table.collapseBorders() && !table.collapsedBorders().isEmpty())
+      context.paintingLayer->setNeedsPaintPhaseDescendantBlockBackgrounds();
+  }
 }
 
 namespace {