Oilpan: Prepare to move RenderObject and RenderObjectChildList to Oilpan heap.

Source/core/rendering/RenderTableSection.h

Index: Source/core/rendering/RenderTableSection.h
diff --git a/Source/core/rendering/RenderTableSection.h b/Source/core/rendering/RenderTableSection.h
index 8395a7366a5ff82314400cc21d741944acbebb81..12924ff5502b7487b7bff305196b4ec72c925ca2 100644
--- a/Source/core/rendering/RenderTableSection.h
+++ b/Source/core/rendering/RenderTableSection.h
@@ -64,6 +64,7 @@ class RenderTableSection FINAL : public RenderBox {
 public:
     RenderTableSection(Element*);
     virtual ~RenderTableSection();
+    virtual void trace(Visitor*) OVERRIDE;
 
     RenderTableRow* firstRow() const;
     RenderTableRow* lastRow() const;
@@ -83,41 +84,47 @@ public:
 
     RenderTable* table() const { return toRenderTable(parent()); }
 
-    typedef Vector<RenderTableCell*, 2> SpanningRenderTableCells;
+    typedef WillBeHeapVector<RawPtrWillBeMember<RenderTableCell>, 2> SpanningRenderTableCells;
 
     struct CellStruct {
-        Vector<RenderTableCell*, 1> cells;
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
+        WillBeHeapVector<RawPtrWillBeMember<RenderTableCell>, 1> cells;
         bool inColSpan; // true for columns after the first in a colspan
 
         CellStruct()
             : inColSpan(false)
         {
         }
+        void trace(Visitor*);
 
         RenderTableCell* primaryCell()
         {
-            return hasCells() ? cells[cells.size() - 1] : 0;
+            return hasCells() ? cells[cells.size() - 1].get() : 0;
         }
 
         const RenderTableCell* primaryCell() const
         {
-            return hasCells() ? cells[cells.size() - 1] : 0;
+            return hasCells() ? cells[cells.size() - 1].get() : 0;
         }
 
         bool hasCells() const { return cells.size() > 0; }
     };
 
-    typedef Vector<CellStruct> Row;
+    typedef WillBeHeapVector<CellStruct> Row;
 
     struct RowStruct {
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
         RowStruct()
-            : rowRenderer(0)
+            : rowRenderer(nullptr)
             , baseline()
         {
         }
+        void trace(Visitor*);
 
         Row row;
-        RenderTableRow* rowRenderer;
+        RawPtrWillBeMember<RenderTableRow> rowRenderer;
         LayoutUnit baseline;
         Length logicalHeight;
     };
@@ -280,7 +287,7 @@ private:
 
     RenderObjectChildList m_children;
 
-    Vector<RowStruct> m_grid;
+    WillBeHeapVector<RowStruct> m_grid;
     Vector<int> m_rowPos;
 
     // the current insertion position
@@ -297,18 +304,31 @@ private:
     // This HashSet holds the overflowing cells for faster painting.
     // If we have more than gMaxAllowedOverflowingCellRatio * total cells, it will be empty
     // and m_forceSlowPaintPathWithOverflowingCell will be set to save memory.
-    HashSet<RenderTableCell*> m_overflowingCells;
+    WillBeHeapHashSet<RawPtrWillBeMember<RenderTableCell> > m_overflowingCells;
     bool m_forceSlowPaintPathWithOverflowingCell;
 
     bool m_hasMultipleCellLevels;
 
     // This map holds the collapsed border values for cells with collapsed borders.
     // It is held at RenderTableSection level to spare memory consumption by table cells.
-    HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
+    WillBeHeapHashMap<pair<RawPtrWillBeMember<const RenderTableCell>, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection());
 
 } // namespace blink
 
+namespace WTF {
+
+#if ENABLE(OILPAN)
+template<> struct VectorTraits<blink::RenderTableSection::CellStruct> : VectorTraitsBase<blink::RenderTableSection::CellStruct> {
+    static const bool needsDestruction = false;
+};
+template<> struct VectorTraits<blink::RenderTableSection::RowStruct> : VectorTraitsBase<blink::RenderTableSection::RowStruct> {
+    static const bool needsDestruction = false;
+};
+#endif
+
+}
+
 #endif // RenderTableSection_h