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

Source/core/layout/svg/LayoutSVGBlock.h

 /*
  * Copyright (C) 2006 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 12 matching lines @@
 #include "core/layout/LayoutBlockFlow.h"
 
 namespace blink {
 
 class SVGElement;
 
 class LayoutSVGBlock : public LayoutBlockFlow {
 public:
     explicit LayoutSVGBlock(SVGElement*);
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override final;
+    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override final;
 
-    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const override final;
+    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = nullptr, const PaintInvalidationState* = nullptr) const override final;
     virtual const LayoutObject* pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap&) const override final;
 
     virtual AffineTransform localTransform() const override final { return m_localTransform; }
 
     virtual DeprecatedPaintLayerType layerTypeRequired() const override final { return NoDeprecatedPaintLayer; }
 
     virtual void invalidateTreeIfNeeded(PaintInvalidationState&) override;
 
 protected:
     virtual void willBeDestroyed() override;
     virtual void mapRectToPaintInvalidationBacking(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const override final;
 
     AffineTransform m_localTransform;
 
     virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectSVG || LayoutBlockFlow::isOfType(type); }
 private:
     virtual void updateFromStyle() override final;
 
     virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const override final;
 
     virtual void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override final;
 
     virtual bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 };
 
 }
 #endif // LayoutSVGBlock_h