Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/css/resolver/FontBuilder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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.
  *
@@ skipping 75 matching lines @@
         return;
 
     FontDescriptionChangeScope scope(this);
 
     scope.reset();
     scope.fontDescription().setGenericFamily(FontDescription::StandardFamily);
     scope.fontDescription().setUsePrinterFont(m_document->printing());
     const AtomicString& standardFontFamily = m_document->settings()->genericFontFamilySettings().standard();
     if (!standardFontFamily.isEmpty()) {
         scope.fontDescription().firstFamily().setFamily(standardFontFamily);
-        scope.fontDescription().firstFamily().appendFamily(0);
+        scope.fontDescription().firstFamily().appendFamily(nullptr);
     }
     scope.fontDescription().setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1);
     setSize(scope.fontDescription(), effectiveZoom, FontSize::fontSizeForKeyword(m_document, CSSValueMedium, false));
 }
 
 void FontBuilder::inheritFrom(const FontDescription& fontDescription)
 {
     FontDescriptionChangeScope scope(this);
 
     scope.set(fontDescription);
@@ skipping 105 matching lines @@
                 break;
             default:
                 break;
             }
         }
 
         if (!face.isEmpty()) {
             if (!currFamily) {
                 // Filling in the first family.
                 firstFamily.setFamily(face);
-                firstFamily.appendFamily(0); // Remove any inherited family-fallback list.
+                firstFamily.appendFamily(nullptr); // Remove any inherited family-fallback list.
                 currFamily = &firstFamily;
                 scope.fontDescription().setIsSpecifiedFont(scope.fontDescription().genericFamily() == FontDescription::NoFamily);
             } else {
                 RefPtr<SharedFontFamily> newFamily = SharedFontFamily::create();
                 newFamily->setFamily(face);
                 currFamily->appendFamily(newFamily);
                 currFamily = newFamily.get();
             }
         }
     }
@@ skipping 414 matching lines @@
 void FontBuilder::createFontForDocument(PassRefPtr<FontSelector> fontSelector, RenderStyle* documentStyle)
 {
     FontDescription fontDescription = FontDescription();
     fontDescription.setScript(localeToScriptCodeForFontSelection(documentStyle->locale()));
     if (Settings* settings = m_document->settings()) {
         fontDescription.setUsePrinterFont(m_document->printing());
         const AtomicString& standardFont = settings->genericFontFamilySettings().standard(fontDescription.script());
         if (!standardFont.isEmpty()) {
             fontDescription.setGenericFamily(FontDescription::StandardFamily);
             fontDescription.firstFamily().setFamily(standardFont);
-            fontDescription.firstFamily().appendFamily(0);
+            fontDescription.firstFamily().appendFamily(nullptr);
         }
         fontDescription.setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1);
         int size = FontSize::fontSizeForKeyword(m_document, CSSValueMedium, false);
         fontDescription.setSpecifiedSize(size);
         fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(fontDescription, documentStyle->effectiveZoom(), size));
     } else {
         fontDescription.setUsePrinterFont(m_document->printing());
     }
 
     FontOrientation fontOrientation;
     NonCJKGlyphOrientation glyphOrientation;
     getFontAndGlyphOrientation(documentStyle, fontOrientation, glyphOrientation);
     fontDescription.setOrientation(fontOrientation);
     fontDescription.setNonCJKGlyphOrientation(glyphOrientation);
     documentStyle->setFontDescription(fontDescription);
     documentStyle->font().update(fontSelector);
 }
 
 }