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 843b517df32641f7ecce230783d96e96b0f2a68d..17d18f32e76f640f7b5b992f988b210ebb1bf986 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 {