C++11: Replace 0 with nullptr where applicable in layout code.

Source/core/layout/LayoutReplaced.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 19 matching lines @@
 class CORE_EXPORT LayoutReplaced : public LayoutBox {
 public:
     LayoutReplaced(Element*);
     LayoutReplaced(Element*, const LayoutSize& intrinsicSize);
     virtual ~LayoutReplaced();
 
     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const override;
     virtual LayoutUnit computeReplacedLogicalHeight() const override;
 
     bool hasReplacedLogicalHeight() const;
-    LayoutRect replacedContentRect(const LayoutSize* overriddenIntrinsicSize = 0) const;
+    LayoutRect replacedContentRect(const LayoutSize* overriddenIntrinsicSize = nullptr) const;
 
     virtual bool needsPreferredWidthsRecalculation() const override;
 
     // These values are specified to be 300 and 150 pixels in the CSS 2.1 spec.
     // http://www.w3.org/TR/CSS2/visudet.html#inline-replaced-width
     static const int defaultWidth;
     static const int defaultHeight;
     virtual bool canHaveChildren() const override { return false; }
     bool shouldPaint(const PaintInfo&, const LayoutPoint&) const;
     virtual void paintReplaced(const PaintInfo&, const LayoutPoint&) { }
@@ skipping 17 matching lines @@
 
     virtual LayoutUnit minimumReplacedHeight() const { return LayoutUnit(); }
 
     virtual void setSelectionState(SelectionState) override final;
 
     virtual void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
 
     void setIntrinsicSize(const LayoutSize& intrinsicSize) { m_intrinsicSize = intrinsicSize; }
     virtual void intrinsicSizeChanged();
 
-    virtual LayoutBox* embeddedContentBox() const { return 0; }
+    virtual LayoutBox* embeddedContentBox() const { return nullptr; }
 
 private:
     virtual void computePreferredLogicalWidths() override final;
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override;
+    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override final;
 
     virtual bool canBeSelectionLeaf() const override { return true; }
 
     virtual LayoutRect selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const override final;
     void computeAspectRatioInformationForLayoutBox(LayoutBox*, FloatSize& constrainedSize, double& intrinsicRatio) const;
 
     mutable LayoutSize m_intrinsicSize;
 };
 
 }
 
 #endif