Rename OS(WINDOWS) to OS(WIN)

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

Index: Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
diff --git a/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp b/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
index 56eef1e333893ea0730ecae6e0e0af779910ceba..6a89201f7ecd4b705889b84d74bc73286b2b883e 100644
--- a/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
+++ b/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
@@ -40,7 +40,7 @@
 #include "core/platform/graphics/chromium/VDMXParser.h"
 #include "wtf/unicode/Unicode.h"
 
-#if OS(WINDOWS)
+#if OS(WIN)
 #include "core/platform/win/HWndDC.h"
 #endif
 
@@ -132,7 +132,7 @@ void SimpleFontData::platformInit()
     // In WebKit/WebCore/platform/graphics/SimpleFontData.cpp, m_spaceWidth is
     // calculated for us, but we need to calculate m_maxCharWidth and
     // m_avgCharWidth in order for text entry widgets to be sized correctly.
-#if OS(WINDOWS)
+#if OS(WIN)
     m_maxCharWidth = SkScalarRound(metrics.fMaxCharWidth);
 #else
     // FIXME: This seems incorrect and should probably use fMaxCharWidth as