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

Source/core/layout/svg/LayoutSVGInlineText.cpp

 /*
  * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  * Copyright (C) 2006 Apple Computer Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2008 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 157 matching lines @@
 
     LayoutBlock* containingBlock = this->containingBlock();
     ASSERT(containingBlock);
 
     // Map local point to absolute point, as the character origins stored in the text fragments use absolute coordinates.
     FloatPoint absolutePoint(point);
     absolutePoint.moveBy(containingBlock->location());
 
     float closestDistance = std::numeric_limits<float>::max();
     float closestDistancePosition = 0;
-    const SVGTextFragment* closestDistanceFragment = 0;
-    SVGInlineTextBox* closestDistanceBox = 0;
+    const SVGTextFragment* closestDistanceFragment = nullptr;
+    SVGInlineTextBox* closestDistanceBox = nullptr;
 
     AffineTransform fragmentTransform;
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         if (!box->isSVGInlineTextBox())
             continue;
 
         SVGInlineTextBox* textBox = toSVGInlineTextBox(box);
         Vector<SVGTextFragment>& fragments = textBox->textFragments();
 
         unsigned textFragmentsSize = fragments.size();
@@ skipping 65 matching lines @@
 
 PassRefPtr<StringImpl> LayoutSVGInlineText::originalText() const
 {
     RefPtr<StringImpl> result = LayoutText::originalText();
     if (!result)
         return nullptr;
     return applySVGWhitespaceRules(result, style() && style()->whiteSpace() == PRE);
 }
 
 }