Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/css/CSSSegmentedFontFace.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 115 matching lines @@
         return;
     }
 
     for (unsigned j = 0; j < numRanges; ++j)
         newFontData->appendRange(FontDataRange(ranges.rangeAt(j).from(), ranges.rangeAt(j).to(), faceFontData));
 }
 
 PassRefPtr<FontData> CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
 {
     if (!isValid())
-        return 0;
+        return nullptr;
 
     FontTraitsMask desiredTraitsMask = fontDescription.traitsMask();
     AtomicString emptyFontFamily = "";
     FontCacheKey key = fontDescription.cacheKey(emptyFontFamily, desiredTraitsMask);
 
-    RefPtr<SegmentedFontData>& fontData = m_fontDataTable.add(key.hash(), 0).storedValue->value;
+    RefPtr<SegmentedFontData>& fontData = m_fontDataTable.add(key.hash(), nullptr).storedValue->value;
     if (fontData && fontData->numRanges())
         return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
 
     if (!fontData)
         fontData = SegmentedFontData::create();
 
     FontDescription requestedFontDescription(fontDescription);
     requestedFontDescription.setTraitsMask(m_traitsMask);
     requestedFontDescription.setSyntheticBold(!(m_traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)));
     requestedFontDescription.setSyntheticItalic(!(m_traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask));
 
     for (FontFaceList::reverse_iterator it = m_fontFaces.rbegin(); it != m_fontFaces.rend(); ++it) {
         if (!(*it)->cssFontFace()->isValid())
             continue;
         if (RefPtr<SimpleFontData> faceFontData = (*it)->cssFontFace()->getFontData(requestedFontDescription)) {
             ASSERT(!faceFontData->isSegmented());
 #if ENABLE(SVG_FONTS)
             // For SVG Fonts that specify that they only support the "normal" variant, we will assume they are incapable
             // of small-caps synthesis and just ignore the font face.
             if (faceFontData->isSVGFont() && (desiredTraitsMask & FontVariantSmallCapsMask) && !(m_traitsMask & FontVariantSmallCapsMask))
                 continue;
 #endif
             appendFontData(fontData.get(), faceFontData.release(), (*it)->cssFontFace()->ranges());
         }
     }
     if (fontData->numRanges())
         return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
 
-    return 0;
+    return nullptr;
 }
 
 bool CSSSegmentedFontFace::isLoading() const
 {
     for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
         if ((*it)->loadStatus() == FontFace::Loading)
             return true;
     }
     return false;
 }
@@ skipping 33 matching lines @@
         if (isLoading())
             m_callbacks.append(callback);
         else if (isLoaded())
             callback->notifyLoaded(this);
         else
             callback->notifyError(this);
     }
 }
 
 }