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

Source/core/inspector/InspectorOverlay.cpp

 /*
  * Copyright (C) 2011 Google 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
@@ skipping 444 matching lines @@
     frame->view()->setCanHaveScrollbars(false);
     frame->view()->setTransparent(true);
     ASSERT(loader->activeDocumentLoader());
     loader->activeDocumentLoader()->writer()->setMIMEType("text/html");
     loader->activeDocumentLoader()->writer()->begin();
     loader->activeDocumentLoader()->writer()->addData(reinterpret_cast<const char*>(InspectorOverlayPage_html), sizeof(InspectorOverlayPage_html));
     loader->activeDocumentLoader()->writer()->end();
 
 #if OS(WINDOWS)
     evaluateInOverlay("setPlatform", "windows");
-#elif OS(MAC_OS_X)
+#elif OS(DARWIN)
     evaluateInOverlay("setPlatform", "mac");
 #elif OS(UNIX)
     evaluateInOverlay("setPlatform", "linux");
 #endif
 
     return m_overlayPage.get();
 }
 
 void InspectorOverlay::reset(const IntSize& viewportSize, const IntSize& frameViewFullSize)
 {
@@ skipping 36 matching lines @@
     info.addMember(m_size, "size");
 }
 
 void InspectorOverlay::freePage()
 {
     m_overlayPage.clear();
 }
 
 } // namespace WebCore