Rename OS(WINDOWS) to OS(WIN)

Source/web/WebSettingsImpl.cpp

Index: Source/web/WebSettingsImpl.cpp
diff --git a/Source/web/WebSettingsImpl.cpp b/Source/web/WebSettingsImpl.cpp
index 3c5abc182ead55a8790f56f5cc59f7e9a299df43..64b9bbe5308a94f6c66e847b2edff167f884b4e1 100644
--- a/Source/web/WebSettingsImpl.cpp
+++ b/Source/web/WebSettingsImpl.cpp
@@ -38,7 +38,7 @@
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 
-#if OS(WINDOWS)
+#if OS(WIN)
 #include "core/rendering/RenderThemeChromiumWin.h"
 #endif
 
@@ -100,7 +100,7 @@ void WebSettingsImpl::setPictographFontFamily(const WebString& font, UScriptCode
 void WebSettingsImpl::setDefaultFontSize(int size)
 {
     m_settings->setDefaultFontSize(size);
-#if OS(WINDOWS)
+#if OS(WIN)
     // RenderTheme is a singleton that needs to know the default font size to
     // draw some form controls. We let it know each time the size changes.
     WebCore::RenderThemeChromiumWin::setDefaultFontSize(size);