Rename OS(DARWIN) to OS(MACOSX).

Source/core/platform/graphics/Font.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Holger Hans Peter Freyther
  *
  * 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 129 matching lines @@
     int emphasisMarkAscent(const AtomicString&) const;
     int emphasisMarkDescent(const AtomicString&) const;
     int emphasisMarkHeight(const AtomicString&) const;
 
     const SimpleFontData* primaryFont() const;
     const FontData* fontDataAt(unsigned) const;
     inline GlyphData glyphDataForCharacter(UChar32 c, bool mirror, FontDataVariant variant = AutoVariant) const
     {
         return glyphDataAndPageForCharacter(c, mirror, variant).first;
     }
-#if OS(DARWIN)
+#if OS(MACOSX)
     const SimpleFontData* fontDataForCombiningCharacterSequence(const UChar*, size_t length, FontDataVariant) const;
 #endif
     std::pair<GlyphData, GlyphPage*> glyphDataAndPageForCharacter(UChar32, bool mirror, FontDataVariant = AutoVariant) const;
     bool primaryFontHasGlyphForCharacter(UChar32) const;
 
     static bool isCJKIdeograph(UChar32);
     static bool isCJKIdeographOrSymbol(UChar32);
 
     static unsigned expansionOpportunityCount(const LChar*, size_t length, TextDirection, bool& isAfterExpansion);
     static unsigned expansionOpportunityCount(const UChar*, size_t length, TextDirection, bool& isAfterExpansion);
@@ skipping 172 matching lines @@
 
 }
 
 namespace WTF {
 
 template <> void deleteOwnedPtr<WebCore::TextLayout>(WebCore::TextLayout*);
 
 }
 
 #endif