Rename OS(WINDOWS) to OS(WIN)

Source/core/page/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 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 81 matching lines @@
     ~EventHandler();
 
     void clear();
     void nodeWillBeRemoved(Node*);
 
     void updateSelectionForMouseDrag();
 
     Node* mousePressNode() const;
     void setMousePressNode(PassRefPtr<Node>);
 
-#if OS(WINDOWS)
+#if OS(WIN)
     void startPanScrolling(RenderObject*);
 #endif
 
     void stopAutoscrollTimer();
     bool mouseDownWasInSubframe() const { return m_mouseDownWasInSubframe; }
 
     void dispatchFakeMouseMoveEventSoon();
     void dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
 
     HitTestResult hitTestResultAtPoint(const LayoutPoint&,
@@ skipping 267 matching lines @@
     double m_maxMouseMovedDuration;
     PlatformEvent::Type m_baseEventType;
     bool m_didStartDrag;
 
     bool m_longTapShouldInvokeContextMenu;
 };
 
 } // namespace WebCore
 
 #endif // EventHandler_h