Fix table background painting

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

Index: third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp b/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
index 77fda1696be1d5ad4fe7402832bce88453184cb2..3dc42a6d507bf46f92fc9c40c84ddeac1ef7cef9 100644
--- a/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/TableSectionPainter.cpp
@@ -14,6 +14,7 @@
 #include "core/paint/ObjectPainter.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/TableCellPainter.h"
+#include "core/paint/TableCollapsedBorderPainter.h"
 #include "core/paint/TableRowPainter.h"
 #include <algorithm>
 
@@ -79,6 +80,7 @@ void TableSectionPainter::paintCollapsedBorders(const PaintInfo& paintInfo, cons
     if (dirtiedColumns.start() >= dirtiedColumns.end())
         return;
 
+
     // Collapsed borders are painted from the bottom right to the top left so that precedence
     // due to cell position is respected.
     for (unsigned r = dirtiedRows.end(); r > dirtiedRows.start(); r--) {
@@ -95,6 +97,28 @@ void TableSectionPainter::paintCollapsedBorders(const PaintInfo& paintInfo, cons
     }
 }
 
+void TableSectionPainter::paintCollapsedBorders2(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, TableCollapsedBorderPainter& previousPainter)
+{
+    if (!m_layoutTableSection.numRows() || !m_layoutTableSection.table()->effectiveColumns().size())
+        return;
+
+    LayoutPoint adjustedPaintOffset = paintOffset + m_layoutTableSection.location();
+    BoxClipper boxClipper(m_layoutTableSection, paintInfo, adjustedPaintOffset, ForceContentsClip);
+
+    LayoutRect localPaintInvalidationRect = LayoutRect(paintInfo.cullRect().m_rect);
+    localPaintInvalidationRect.moveBy(-adjustedPaintOffset);
+
+    LayoutRect tableAlignedRect = m_layoutTableSection.logicalRectForWritingModeAndDirection(localPaintInvalidationRect);
+
+    CellSpan dirtiedRows = m_layoutTableSection.dirtiedRows(tableAlignedRect);
+    CellSpan dirtiedEffColumns = m_layoutTableSection.dirtiedEffectiveColumns(tableAlignedRect);
+
+    TableCollapsedBorderPainter painter(&m_layoutTableSection);
+    painter.paintBorders(paintInfo, paintOffset, dirtiedRows, dirtiedEffColumns, previousPainter);
+    previousPainter = painter;
+    return;
+}
+
 void TableSectionPainter::paintObject(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     LayoutRect localPaintInvalidationRect = LayoutRect(paintInfo.cullRect().m_rect);