Paint backgrounds of a table section/row in 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 7d84659985f4f467418dcc5bed68fe6d6e7341a9..671c5c405d1fd30c7a9cc21268e94da58dc75345 100644
--- a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -11,6 +11,7 @@
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutTable.h"
+#include "core/layout/LayoutTableSection.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/svg/SVGLayoutSupport.h"
 #include "core/paint/ObjectPaintProperties.h"
@@ -233,6 +234,12 @@ void PaintInvalidator::updatePaintingLayer(const LayoutObject& object,
   if (object == context.paintingLayer->layoutObject())
     return;
 
+  if (object.isTableSection()) {
+    const auto& section = toLayoutTableSection(object);
+    if (section.table()->hasColElements())
+      context.paintingLayer->setNeedsPaintPhaseDescendantBlockBackgrounds();
+  }
+
   if (object.styleRef().hasOutline())
     context.paintingLayer->setNeedsPaintPhaseDescendantOutlines();