Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/rendering/AbstractInlineTextBox.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "core/editing/TextIterator.h"
 #include "platform/text/TextBreakIterator.h"
 
 namespace WebCore {
 
 AbstractInlineTextBox::InlineToAbstractInlineTextBoxHashMap* AbstractInlineTextBox::gAbstractInlineTextBoxMap = 0;
 
 PassRefPtr<AbstractInlineTextBox> AbstractInlineTextBox::getOrCreate(RenderText* renderText, InlineTextBox* inlineTextBox)
 {
     if (!inlineTextBox)
-        return 0;
+        return nullptr;
 
     if (!gAbstractInlineTextBoxMap)
         gAbstractInlineTextBoxMap = new InlineToAbstractInlineTextBoxHashMap();
 
     InlineToAbstractInlineTextBoxHashMap::const_iterator it = gAbstractInlineTextBoxMap->find(inlineTextBox);
     if (it != gAbstractInlineTextBoxMap->end())
         return it->value;
 
     RefPtr<AbstractInlineTextBox> obj = adoptRef(new AbstractInlineTextBox(renderText, inlineTextBox));
     gAbstractInlineTextBoxMap->set(inlineTextBox, obj);
@@ skipping 14 matching lines @@
 
 void AbstractInlineTextBox::detach()
 {
     m_renderText = 0;
     m_inlineTextBox = 0;
 }
 
 PassRefPtr<AbstractInlineTextBox> AbstractInlineTextBox::nextInlineTextBox() const
 {
     if (!m_inlineTextBox)
-        return 0;
+        return nullptr;
 
     return getOrCreate(m_renderText, m_inlineTextBox->nextTextBox());
 }
 
 LayoutRect AbstractInlineTextBox::bounds() const
 {
     if (!m_inlineTextBox || !m_renderText)
         return LayoutRect();
 
     FloatRect boundaries = m_inlineTextBox->calculateBoundaries();
@@ skipping 65 matching lines @@
         return plainText(range.get(), TextIteratorIgnoresStyleVisibility);
     }
 
     String result = m_renderText->text().substring(start, len).simplifyWhiteSpace(WTF::DoNotStripWhiteSpace);
     if (m_inlineTextBox->nextTextBox() && m_inlineTextBox->nextTextBox()->start() > m_inlineTextBox->end() && result.length() && !result.right(1).containsOnlyWhitespace())
         return result + " ";
     return result;
 }
 
 } // namespace WebCore