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

Source/core/layout/line/InlineBox.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 160 matching lines @@
 void InlineBox::dirtyLineBoxes()
 {
     markDirty();
     for (InlineFlowBox* curr = parent(); curr && !curr->isDirty(); curr = curr->parent())
         curr->markDirty();
 }
 
 void InlineBox::deleteLine()
 {
     if (!m_bitfields.extracted() && layoutObject().isBox())
-        toLayoutBox(layoutObject()).setInlineBoxWrapper(0);
+        toLayoutBox(layoutObject()).setInlineBoxWrapper(nullptr);
     destroy();
 }
 
 void InlineBox::extractLine()
 {
     m_bitfields.setExtracted(true);
     if (layoutObject().isBox())
-        toLayoutBox(layoutObject()).setInlineBoxWrapper(0);
+        toLayoutBox(layoutObject()).setInlineBoxWrapper(nullptr);
 }
 
 void InlineBox::attachLine()
 {
     m_bitfields.setExtracted(false);
     if (layoutObject().isBox())
         toLayoutBox(layoutObject()).setInlineBoxWrapper(this);
 }
 
 void InlineBox::adjustPosition(LayoutUnit dx, LayoutUnit dy)
@@ skipping 57 matching lines @@
         else if (nextOnLine())
             m_bitfields.setNextOnLineExists(true);
         else
             m_bitfields.setNextOnLineExists(parent()->nextOnLineExists());
     }
     return m_bitfields.nextOnLineExists();
 }
 
 InlineBox* InlineBox::nextLeafChild() const
 {
-    InlineBox* leaf = 0;
+    InlineBox* leaf = nullptr;
     for (InlineBox* box = nextOnLine(); box && !leaf; box = box->nextOnLine())
         leaf = box->isLeaf() ? box : toInlineFlowBox(box)->firstLeafChild();
     if (!leaf && parent())
         leaf = parent()->nextLeafChild();
     return leaf;
 }
 
 InlineBox* InlineBox::prevLeafChild() const
 {
-    InlineBox* leaf = 0;
+    InlineBox* leaf = nullptr;
     for (InlineBox* box = prevOnLine(); box && !leaf; box = box->prevOnLine())
         leaf = box->isLeaf() ? box : toInlineFlowBox(box)->lastLeafChild();
     if (!leaf && parent())
         leaf = parent()->prevLeafChild();
     return leaf;
 }
 
 InlineBox* InlineBox::nextLeafChildIgnoringLineBreak() const
 {
     InlineBox* leaf = nextLeafChild();
-    if (leaf && leaf->isLineBreak())
-        return 0;
-    return leaf;
+    return (leaf && leaf->isLineBreak()) ? nullptr : leaf;
 }
 
 InlineBox* InlineBox::prevLeafChildIgnoringLineBreak() const
 {
     InlineBox* leaf = prevLeafChild();
-    if (leaf && leaf->isLineBreak())
-        return 0;
-    return leaf;
+    return (leaf && leaf->isLineBreak()) ? nullptr : leaf;
 }
 
 LayoutObject::SelectionState InlineBox::selectionState() const
 {
     return layoutObject().selectionState();
 }
 
 bool InlineBox::canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth) const
 {
     // Non-replaced elements can always accommodate an ellipsis.
@@ skipping 88 matching lines @@
 
 void showLineTree(const blink::InlineBox* b)
 {
     if (b)
         b->showLineTreeForThis();
     else
         fprintf(stderr, "Cannot showLineTree for (nil) InlineBox.\n");
 }
 
 #endif