Rename OS(WINDOWS) to OS(WIN)

Source/core/page/Page.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 139 matching lines @@
     void setValidationMessageClient(ValidationMessageClient* client) { m_validationMessageClient = client; }
 
     bool autoscrollInProgress() const;
     bool autoscrollInProgress(const RenderBox*) const;
     bool panScrollInProgress() const;
     void startAutoscrollForSelection(RenderObject*);
     void stopAutoscrollIfNeeded(RenderObject*);
     void stopAutoscrollTimer();
     void updateAutoscrollRenderer();
     void updateDragAndDrop(Node* targetNode, const IntPoint& eventPosition, double eventTime);
-#if OS(WINDOWS)
+#if OS(WIN)
     void handleMouseReleaseForPanScrolling(Frame*, const PlatformMouseEvent&);
     void startPanScrolling(RenderBox*, const IntPoint&);
 #endif
 
     ScrollingCoordinator* scrollingCoordinator();
 
     String mainThreadScrollingReasonsAsText();
     PassRefPtr<ClientRectList> nonFastScrollableRects(const Frame*);
 
     Settings& settings() const { return *m_settings; }
@@ skipping 149 matching lines @@
 #endif
 
     const OwnPtr<PageConsole> m_console;
 
     HashSet<MultisamplingChangedObserver*> m_multisamplingChangedObservers;
 };
 
 } // namespace WebCore
 
 #endif // Page_h