Oilpan: move RenderObjects off heap.

Source/core/paint/TableSectionPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/TableSectionPainter.h"
 
 #include "core/layout/LayoutTable.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
@@ skipping 51 matching lines @@
 void TableSectionPainter::paintObject(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     LayoutRect localPaintInvalidationRect = paintInfo.rect;
     localPaintInvalidationRect.moveBy(-paintOffset);
 
     LayoutRect tableAlignedRect = m_layoutTableSection.logicalRectForWritingModeAndDirection(localPaintInvalidationRect);
 
     CellSpan dirtiedRows = m_layoutTableSection.dirtiedRows(tableAlignedRect);
     CellSpan dirtiedColumns = m_layoutTableSection.dirtiedColumns(tableAlignedRect);
 
-    WillBeHeapHashSet<RawPtrWillBeMember<LayoutTableCell> > overflowingCells = m_layoutTableSection.overflowingCells();
+    HashSet<LayoutTableCell*> overflowingCells = m_layoutTableSection.overflowingCells();
     if (dirtiedColumns.start() < dirtiedColumns.end()) {
         if (!m_layoutTableSection.hasMultipleCellLevels() && !overflowingCells.size()) {
             if (paintInfo.phase == PaintPhaseCollapsedTableBorders) {
                 // 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--) {
                     unsigned row = r - 1;
                     for (unsigned c = dirtiedColumns.end(); c > dirtiedColumns.start(); c--) {
                         unsigned col = c - 1;
                         LayoutTableSection::CellStruct& current = m_layoutTableSection.cellAt(row, col);
@@ skipping 105 matching lines @@
             // painting the row background for the cell.
             if (!row->hasSelfPaintingLayer())
                 tableCellPainter.paintBackgroundsBehindCell(paintInfo, cellPoint, row);
         }
     }
     if ((!cell->hasSelfPaintingLayer() && !row->hasSelfPaintingLayer()))
         cell->paint(paintInfo, cellPoint);
 }
 
 } // namespace blink