Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/html/HTMLTextFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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 404 matching lines @@
         offsetInContainer = offset;
     } else {
         containerNode = node->parentNode();
         offsetInContainer = node->nodeIndex() + offset;
     }
 }
 
 PassRefPtr<Range> HTMLTextFormControlElement::selection() const
 {
     if (!renderer() || !isTextFormControl() || !hasCachedSelection())
-        return 0;
+        return nullptr;
 
     int start = m_cachedSelectionStart;
     int end = m_cachedSelectionEnd;
 
     ASSERT(start <= end);
     HTMLElement* innerText = innerTextElement();
     if (!innerText)
-        return 0;
+        return nullptr;
 
     if (!innerText->firstChild())
         return Range::create(document(), innerText, 0, innerText, 0);
 
     int offset = 0;
     Node* startNode = 0;
     Node* endNode = 0;
     for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
         ASSERT(!node->firstChild());
         ASSERT(node->isTextNode() || node->hasTagName(brTag));
         int length = node->isTextNode() ? lastOffsetInNode(node) : 1;
 
         if (offset <= start && start <= offset + length)
             setContainerAndOffsetForRange(node, start - offset, startNode, start);
 
         if (offset <= end && end <= offset + length) {
             setContainerAndOffsetForRange(node, end - offset, endNode, end);
             break;
         }
 
         offset += length;
     }
 
     if (!startNode || !endNode)
-        return 0;
+        return nullptr;
 
     return Range::create(document(), startNode, start, endNode, end);
 }
 
 void HTMLTextFormControlElement::restoreCachedSelection()
 {
     setSelectionRange(m_cachedSelectionStart, m_cachedSelectionEnd, m_cachedSelectionDirection);
 }
 
 void HTMLTextFormControlElement::selectionChanged(bool userTriggered)
@@ skipping 174 matching lines @@
 
     return "ltr";
 }
 
 HTMLElement* HTMLTextFormControlElement::innerTextElement() const
 {
     return toHTMLElement(userAgentShadowRoot()->getElementById(ShadowElementNames::innerEditor()));
 }
 
 } // namespace Webcore