Rename OS(WINDOWS) to OS(WIN)

Source/core/platform/graphics/skia/GlyphPageTreeNodeSkia.cpp

 /*
  * Copyright (c) 2008, 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 32 matching lines @@
 {
     if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) {
         SkDebugf("%s last char is high-surrogate", __FUNCTION__);
         return false;
     }
 
     SkPaint paint;
     fontData->platformData().setupPaint(&paint);
     paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
 
-#if OS(WINDOWS)
+#if OS(WIN)
     // FIXME: For some reason SkAutoSTMalloc fails to link on Windows.
     // SkAutoSTArray works fine though...
     SkAutoSTArray<GlyphPage::size, uint16_t> glyphStorage(length);
 #else
     SkAutoSTMalloc<GlyphPage::size, uint16_t> glyphStorage(length);
 #endif
 
     uint16_t* glyphs = glyphStorage.get();
     // textToGlyphs takes a byte count, not a glyph count so we multiply by two.
     unsigned count = paint.textToGlyphs(buffer, bufferLength * 2, glyphs);
     if (count != length) {
         SkDebugf("%s count != length\n", __FUNCTION__);
         return false;
     }
 
     unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
     for (unsigned i = 0; i < length; i++) {
         setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? fontData : NULL);
         allGlyphs |= glyphs[i];
     }
 
     return allGlyphs != 0;
 }
 
 }  // namespace WebCore