Replace RenderArena with PartitionAlloc.

Source/core/rendering/RenderBlock.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 311 matching lines @@
     // direction (so an x-offset in vertical text and a y-offset for horizontal text).
     LayoutUnit pageLogicalOffset() const { return m_rareData ? m_rareData->m_pageLogicalOffset : LayoutUnit(); }
     void setPageLogicalOffset(LayoutUnit);
 
     RootInlineBox* lineGridBox() const { return m_rareData ? m_rareData->m_lineGridBox : 0; }
     void setLineGridBox(RootInlineBox* box)
     {
         if (!m_rareData)
             m_rareData = adoptPtr(new RenderBlockRareData(this));
         if (m_rareData->m_lineGridBox)
-            m_rareData->m_lineGridBox->destroy(renderArena());
+            m_rareData->m_lineGridBox->destroy();
         m_rareData->m_lineGridBox = box;
     }
     void layoutLineGridBox();
 
     // Accessors for logical width/height and margins in the containing block's block-flow direction.
     enum ApplyLayoutDeltaMode { ApplyLayoutDelta, DoNotApplyLayoutDelta };
     LayoutUnit logicalWidthForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->width() : child->height(); }
     LayoutUnit logicalHeightForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->height() : child->width(); }
     LayoutUnit logicalTopForChild(const RenderBox* child) { return isHorizontalWritingMode() ? child->y() : child->x(); }
     void setLogicalLeftForChild(RenderBox* child, LayoutUnit logicalLeft, ApplyLayoutDeltaMode = DoNotApplyLayoutDelta);
@@ skipping 973 matching lines @@
     static String string(const int value);
 };
 template<> struct ValueToString<RenderBlock::FloatingObject*> {
     static String string(const RenderBlock::FloatingObject*);
 };
 #endif
 
 } // namespace WebCore
 
 #endif // RenderBlock_h