Rename OS(DARWIN) to OS(MACOSX).

Source/web/WebPluginContainerImpl.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 730 matching lines @@
         event->setDefaultHandled();
 }
 
 void WebPluginContainerImpl::handleKeyboardEvent(KeyboardEvent* event)
 {
     WebKeyboardEventBuilder webEvent(*event);
     if (webEvent.type == WebInputEvent::Undefined)
         return;
 
     if (webEvent.type == WebInputEvent::KeyDown) {
-#if OS(DARWIN)
+#if OS(MACOSX)
         if (webEvent.modifiers == WebInputEvent::MetaKey
 #else
         if (webEvent.modifiers == WebInputEvent::ControlKey
 #endif
             && webEvent.windowsKeyCode == VKEY_C
             // Only copy if there's a selection, so that we only ever do this
             // for Pepper plugins that support copying.  Windowless NPAPI
             // plugins will get the event as before.
             && m_webPlugin->hasSelection()) {
             copy();
@@ skipping 126 matching lines @@
         // Take our element and get the clip rect from the enclosing layer and
         // frame view.
         clipRect.intersect(
             m_element->document().view()->windowClipRectForFrameOwner(m_element, true));
     }
 
     return clipRect;
 }
 
 } // namespace WebKit