Replace RenderArena with PartitionAlloc.

Source/core/rendering/RenderDeprecatedFlexibleBox.cpp

 /*
  * This file is part of the render object implementation for KHTML.
  *
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * 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
@@ skipping 124 matching lines @@
             UseCounter::count(document(), UseCounter::DeprecatedFlexboxWebContent);
     }
 }
 
 RenderDeprecatedFlexibleBox::~RenderDeprecatedFlexibleBox()
 {
 }
 
 RenderDeprecatedFlexibleBox* RenderDeprecatedFlexibleBox::createAnonymous(Document* document)
 {
-    RenderDeprecatedFlexibleBox* renderer = new (document->renderArena()) RenderDeprecatedFlexibleBox(0);
+    RenderDeprecatedFlexibleBox* renderer = new RenderDeprecatedFlexibleBox(0);
     renderer->setDocumentForAnonymous(document);
     return renderer;
 }
 
 static LayoutUnit marginWidthForChild(RenderBox* child)
 {
     // A margin basically has three types: fixed, percentage, and auto (variable).
     // Auto and percentage margins simply become 0 when computing min/max width.
     // Fixed margins can be added in as is.
     Length marginLeft = child->style()->marginLeft();
@@ skipping 943 matching lines @@
     if (isPseudoElement())
         return "RenderDeprecatedFlexibleBox (generated)";
     if (isAnonymous())
         return "RenderDeprecatedFlexibleBox (generated)";
     if (isRelPositioned())
         return "RenderDeprecatedFlexibleBox (relative positioned)";
     return "RenderDeprecatedFlexibleBox";
 }
 
 } // namespace WebCore