Replace RenderArena with PartitionAlloc

Source/core/rendering/LayoutState.h

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef LayoutState_h
 #define LayoutState_h
 
 #include "core/platform/graphics/LayoutRect.h"
 #include "core/rendering/ColumnInfo.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 
 namespace WebCore {
 
-class RenderArena;
 class RenderBlock;
 class RenderBox;
 class RenderObject;
 class RenderFlowThread;
 class ShapeInsideInfo;
 
 class LayoutState {
     WTF_MAKE_NONCOPYABLE(LayoutState);
 public:
     LayoutState()
@@ skipping 11 matching lines @@
         , m_pageLogicalHeight(0)
 #ifndef NDEBUG
         , m_renderer(0)
 #endif
     {
     }
 
     LayoutState(LayoutState*, RenderBox*, const LayoutSize& offset, LayoutUnit pageHeight, bool pageHeightChanged, ColumnInfo*);
     LayoutState(RenderObject*);
 
-    void destroy(RenderArena*);
-
-    // Overloaded new operator.
-    void* operator new(size_t, RenderArena*);
-
-    // Overridden to prevent the normal delete from being called.
-    void operator delete(void*, size_t);
+    // LayoutState is allocated out of the rendering partition.
+    void* operator new(size_t);
+    void operator delete(void*);
 
     void clearPaginationInformation();
     bool isPaginatingColumns() const { return m_columnInfo && m_columnInfo->paginationUnit() == ColumnInfo::Column; }
     bool isPaginated() const { return m_isPaginated; }
 
     // The page logical offset is the object's offset from the top of the page in the page progression
     // direction (so an x-offset in vertical text and a y-offset for horizontal text).
     LayoutUnit pageLogicalOffset(RenderBox*, LayoutUnit childLogicalOffset) const;
 
     void addForcedColumnBreak(RenderBox*, LayoutUnit childLogicalOffset);
 
     LayoutUnit pageLogicalHeight() const { return m_pageLogicalHeight; }
     bool pageLogicalHeightChanged() const { return m_pageLogicalHeightChanged; }
 
     RenderBlock* lineGrid() const { return m_lineGrid; }
     LayoutSize lineGridOffset() const { return m_lineGridOffset; }
     LayoutSize lineGridPaginationOrigin() const { return m_lineGridPaginationOrigin; }
 
     LayoutSize layoutOffset() const { return m_layoutOffset; }
 
     bool needsBlockDirectionLocationSetBeforeLayout() const { return m_lineGrid || (m_isPaginated && m_pageLogicalHeight); }
 
     ShapeInsideInfo* shapeInsideInfo() const { return m_shapeInsideInfo; }
 private:
-    // The normal operator new is disallowed.
-    void* operator new(size_t) throw();
-
     void propagateLineGridInfo(RenderBox*);
     void establishLineGrid(RenderBlock*);
 
     void computeLineGridPaginationOrigin(RenderBox*);
 
 public:
     // Do not add anything apart from bitfields until after m_columnInfo. See https://bugs.webkit.org/show_bug.cgi?id=100173
     bool m_clipped:1;
     bool m_isPaginated:1;
     // If our page height has changed, this will force all blocks to relayout.
@@ skipping 30 matching lines @@
     LayoutSize m_lineGridPaginationOrigin;
 
 #ifndef NDEBUG
     RenderObject* m_renderer;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // LayoutState_h