Rename OS(UNIX) to OS(POSIX)

Source/core/page/Settings.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2011, 2012 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 76 matching lines @@
 // 99) MacEditingBehavior is used a fallback.
 static EditingBehaviorType editingBehaviorTypeForPlatform()
 {
     return
 #if OS(MACOSX)
     EditingMacBehavior
 #elif OS(WIN)
     EditingWindowsBehavior
 #elif OS(ANDROID)
     EditingAndroidBehavior
-#elif OS(UNIX)
+#elif OS(POSIX)
     EditingUnixBehavior
 #else
     // Fallback
     EditingMacBehavior
 #endif
     ;
 }
 
 static const bool defaultUnifiedTextCheckerEnabled = false;
 #if OS(MACOSX)
@@ skipping 278 matching lines @@
 {
     if (m_viewportEnabled == enabled)
         return;
 
     m_viewportEnabled = enabled;
     if (m_page->mainFrame())
         m_page->mainFrame()->document()->updateViewportArguments();
 }
 
 } // namespace WebCore