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

Source/core/layout/svg/line/SVGRootInlineBox.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) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) CO. Ltd. 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 119 matching lines @@
 }
 
 InlineBox* SVGRootInlineBox::closestLeafChildForPosition(const LayoutPoint& point)
 {
     InlineBox* firstLeaf = firstLeafChild();
     InlineBox* lastLeaf = lastLeafChild();
     if (firstLeaf == lastLeaf)
         return firstLeaf;
 
     // FIXME: Check for vertical text!
-    InlineBox* closestLeaf = 0;
+    InlineBox* closestLeaf = nullptr;
     for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafChild()) {
         if (!leaf->isSVGInlineTextBox())
             continue;
         if (point.y() < leaf->y())
             continue;
         if (point.y() > leaf->y() + leaf->virtualLogicalHeight())
             continue;
 
         closestLeaf = leaf;
         if (point.x() < leaf->left() + leaf->logicalWidth())
@@ skipping 55 matching lines @@
         }
 
         SVGInlineTextBox* firstTextBox = toSVGInlineTextBox(*first);
         SVGInlineTextBox* lastTextBox = toSVGInlineTextBox(*last);
 
         // Reordering is only necessary for BiDi text that is _absolutely_ positioned.
         if (firstTextBox->len() == 1 && firstTextBox->len() == lastTextBox->len()) {
             LayoutSVGInlineText& firstContext = toLayoutSVGInlineText(firstTextBox->layoutObject());
             LayoutSVGInlineText& lastContext = toLayoutSVGInlineText(lastTextBox->layoutObject());
 
-            SVGTextLayoutAttributes* firstAttributes = 0;
-            SVGTextLayoutAttributes* lastAttributes = 0;
+            SVGTextLayoutAttributes* firstAttributes = nullptr;
+            SVGTextLayoutAttributes* lastAttributes = nullptr;
             findFirstAndLastAttributesInVector(attributes, &firstContext, &lastContext, firstAttributes, lastAttributes);
             swapItemsInLayoutAttributes(firstAttributes, lastAttributes, firstTextBox->start(), lastTextBox->start());
         }
 
         InlineBox* temp = *first;
         *first = *last;
         *last = temp;
 
         ++first;
     }
 }
 
 void SVGRootInlineBox::reorderValueLists(Vector<SVGTextLayoutAttributes*>& attributes)
 {
     Vector<InlineBox*> leafBoxesInLogicalOrder;
     collectLeafBoxesInLogicalOrder(leafBoxesInLogicalOrder, reverseInlineBoxRangeAndValueListsIfNeeded, &attributes);
 }
 
 } // namespace blink