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

Source/core/layout/svg/LayoutSVGRoot.h

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 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.
@@ skipping 69 matching lines @@
     virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectSVG || type == LayoutObjectSVGRoot || LayoutReplaced::isOfType(type); }
 
     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const override;
     virtual LayoutUnit computeReplacedLogicalHeight() const override;
     virtual void layout() override;
     virtual void paintReplaced(const PaintInfo&, const LayoutPoint&) override;
 
     virtual void willBeDestroyed() override;
     virtual void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
     virtual bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
-    virtual void addChild(LayoutObject* child, LayoutObject* beforeChild = 0) override;
+    virtual void addChild(LayoutObject* child, LayoutObject* beforeChild = nullptr) override;
     virtual void removeChild(LayoutObject*) override;
 
     virtual void insertedIntoTree() override;
     virtual void willBeRemovedFromTree() override;
 
     virtual const AffineTransform& localToParentTransform() const override;
 
     virtual FloatRect objectBoundingBox() const override { return m_objectBoundingBox; }
     virtual FloatRect strokeBoundingBox() const override { return m_strokeBoundingBox; }
     virtual FloatRect paintInvalidationRectInLocalCoordinates() const override { return m_paintInvalidationBoundingBox; }
 
     virtual bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override;
+    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
 
-    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const override;
+    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = nullptr, const PaintInvalidationState* = nullptr) const override;
     virtual const LayoutObject* pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap&) const override;
 
     virtual bool canBeSelectionLeaf() const override { return false; }
     virtual bool canHaveChildren() const override { return true; }
 
     virtual void descendantIsolationRequirementsChanged(DescendantIsolationState) override final;
 
     void updateCachedBoundaries();
     void buildLocalToBorderBoxTransform();
 
@@ skipping 10 matching lines @@
     bool m_hasBoxDecorationBackground : 1;
     mutable bool m_hasNonIsolatedBlendingDescendants : 1;
     mutable bool m_hasNonIsolatedBlendingDescendantsDirty : 1;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGRoot, isSVGRoot());
 
 } // namespace blink
 
 #endif // LayoutSVGRoot_h