Remove OS(IOS) and OS(MAC_OS_X) guards.

Source/core/page/NavigatorBase.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 18 matching lines @@
 
 #include "core/platform/network/NetworkStateNotifier.h"
 #include <wtf/text/WTFString.h>
 
 #if OS(LINUX)
 #include "sys/utsname.h"
 #include <wtf/StdLibExtras.h>
 #endif
 
 #ifndef WEBCORE_NAVIGATOR_PLATFORM
-#if OS(MAC_OS_X) && (CPU(PPC) || CPU(PPC64))
+#if OS(DARWIN) && (CPU(PPC) || CPU(PPC64))
 #define WEBCORE_NAVIGATOR_PLATFORM "MacPPC"
-#elif OS(MAC_OS_X) && (CPU(X86) || CPU(X86_64))
+#elif OS(DARWIN) && (CPU(X86) || CPU(X86_64))
 #define WEBCORE_NAVIGATOR_PLATFORM "MacIntel"
 #elif OS(WINDOWS)
 #define WEBCORE_NAVIGATOR_PLATFORM "Win32"
 #else
 #define WEBCORE_NAVIGATOR_PLATFORM ""
 #endif
 #endif // ifndef WEBCORE_NAVIGATOR_PLATFORM
 
 #ifndef WEBCORE_NAVIGATOR_PRODUCT
 #define WEBCORE_NAVIGATOR_PRODUCT "Gecko"
@@ skipping 67 matching lines @@
 {
     return WEBCORE_NAVIGATOR_VENDOR_SUB;
 }
 
 bool NavigatorBase::onLine() const
 {
     return networkStateNotifier().onLine();
 }
 
 } // namespace WebCore