Replace RenderArena with PartitionAlloc.

Source/core/rendering/RenderWidget.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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 13 matching lines @@
 #include "config.h"
 #include "core/rendering/RenderWidget.h"
 
 #include "core/accessibility/AXObjectCache.h"
 #include "core/page/Frame.h"
 #include "core/platform/graphics/GraphicsContext.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderLayerBacking.h"
 #include "core/rendering/RenderView.h"
-#include "core/rendering/RenderWidgetProtector.h"
 
 using namespace std;
 
 namespace WebCore {
 
 static HashMap<const Widget*, RenderWidget*>& widgetRendererMap()
 {
     static HashMap<const Widget*, RenderWidget*>* staticWidgetRendererMap = new HashMap<const Widget*, RenderWidget*>;
     return *staticWidgetRendererMap;
 }
@@ skipping 60 matching lines @@
 
     setWidget(0);
 
     RenderReplaced::willBeDestroyed();
 }
 
 void RenderWidget::destroy()
 {
     willBeDestroyed();
 
-    // Grab the arena from node()->document()->renderArena() before clearing the node pointer.
     // Clear the node before deref-ing, as this may be deleted when deref is called.
-    RenderArena* arena = renderArena();
     clearNode();
-    deref(arena);
+    deref();
 }
 
 RenderWidget::~RenderWidget()
 {
     ASSERT(m_refCount <= 0);
     clearWidget();
 }
 
 // Widgets are always placed on integer boundaries, so rounding the size is actually
 // the desired behavior. This function is here because it's otherwise seldom what we
@@ skipping 11 matching lines @@
     IntRect clipRect = roundedIntRect(enclosingLayer()->childrenClipRect());
     IntRect newFrame = roundedIntRect(frame);
     bool clipChanged = m_clipRect != clipRect;
     bool boundsChanged = m_widget->frameRect() != newFrame;
 
     if (!boundsChanged && !clipChanged)
         return false;
 
     m_clipRect = clipRect;
 
-    RenderWidgetProtector protector(this);
     RefPtr<Node> protectedNode(node());
     m_widget->setFrameRect(newFrame);
 
     if (clipChanged && !boundsChanged)
         m_widget->clipRectChanged();
     
     if (hasLayer() && layer()->isComposited())
         layer()->backing()->updateAfterWidgetResize();
 
     return boundsChanged;
@@ skipping 149 matching lines @@
         layer()->paintResizer(paintInfo.context, roundedIntPoint(adjustedPaintOffset), paintInfo.rect);
 }
 
 void RenderWidget::setOverlapTestResult(bool isOverlapped)
 {
     ASSERT(m_widget);
     ASSERT(m_widget->isFrameView());
     toFrameView(m_widget.get())->setIsOverlapped(isOverlapped);
 }
 
-void RenderWidget::deref(RenderArena *arena)
+void RenderWidget::deref()
 {
     if (--m_refCount <= 0)
-        arenaDelete(arena, this);
+        postDestroy();
 }
 
 void RenderWidget::updateWidgetPosition()
 {
     if (!m_widget || !node()) // Check the node in case destroy() has been called.
         return;
 
     bool boundsChanged = updateWidgetGeometry();
     
     // if the frame bounds got changed, or if view needs layout (possibly indicating
@@ skipping 45 matching lines @@
 CursorDirective RenderWidget::getCursor(const LayoutPoint& point, Cursor& cursor) const
 {
     if (widget() && widget()->isPluginView()) {
         // A plug-in is responsible for setting the cursor when the pointer is over it.
         return DoNotSetCursor;
     }
     return RenderReplaced::getCursor(point, cursor);
 }
 
 } // namespace WebCore