Avoid using !OS() constructs.

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 183b235223b8d7a155a36a5d1307210eb07a1e92..9e693e9ad7779d1d1e41c29b8a016e62d49a9292 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -2092,15 +2092,15 @@ bool EventHandler::isInsideScrollbar(const IntPoint& windowPoint) const
 
 bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult& result, const PlatformWheelEvent& event) const
 {
-#if OS(UNIX) && !OS(MACOSX)
+#if OS(WINDOWS) || OS(MACOSX)

[abarth-chromium, 2013/09/09 17:26:24]

Should Android do this too?

+    UNUSED_PARAM(result);
+    UNUSED_PARAM(event);
+    return false;
+#else
     // GTK+ must scroll horizontally if the mouse pointer is on top of the
     // horizontal scrollbar while scrolling with the wheel.
     // This code comes from gtk/EventHandlerGtk.cpp.
     return !event.hasPreciseScrollingDeltas() && result.scrollbar() && result.scrollbar()->orientation() == HorizontalScrollbar;
-#else
-    UNUSED_PARAM(result);
-    UNUSED_PARAM(event);
-    return false;
 #endif
 }