Avoid using !OS() constructs.

Source/web/WebFrameImpl.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 360 matching lines @@
                 graphicsContext.save();
                 graphicsContext.setStrokeColor(Color(0, 0, 255));
                 graphicsContext.setFillColor(Color(0, 0, 255));
                 graphicsContext.drawLine(IntPoint(0, currentHeight), IntPoint(pageWidth, currentHeight));
                 graphicsContext.restore();
             }
 
             graphicsContext.save();
 
             graphicsContext.translate(0, currentHeight);
-#if !OS(POSIX) || OS(MACOSX)
+#if OS(WIN) || OS(MACOSX)
             // Account for the disabling of scaling in spoolPage. In the context
             // of spoolAllPagesWithBoundaries the scale HAS NOT been pre-applied.
             float scale = getPageShrink(pageIndex);
             graphicsContext.scale(WebCore::FloatSize(scale, scale));
 #endif
             spoolPage(graphicsContext, pageIndex);
             graphicsContext.restore();
 
             currentHeight += pageSizeInPixels.height() + 1;
         }
@@ skipping 2084 matching lines @@
 
         // There is a possibility that the frame being detached was the only
         // pending one. We need to make sure final replies can be sent.
         flushCurrentScopingEffort(m_findRequestIdentifier);
 
         cancelPendingScopingEffort();
     }
 }
 
 } // namespace WebKit