Revert of Re-land enable gesture events for wheel events on all platforms other that OSX.

content/common/input/input_event_utils.cc

Index: content/common/input/input_event_utils.cc
diff --git a/content/common/input/input_event_utils.cc b/content/common/input/input_event_utils.cc
index 6bd9eaeb03013d6cb86b3edba5a38f0ab2a3236e..925452f56d9bb821465afb28bac9dde72f0813a8 100644
--- a/content/common/input/input_event_utils.cc
+++ b/content/common/input/input_event_utils.cc
@@ -11,13 +11,7 @@
 
 bool UseGestureBasedWheelScrolling() {
   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
-// TODO(dtapuska): OSX has special code to deal with mouse wheel
-// and overscroll that needs to be fixed. crbug.com/587979
-#if defined(OS_MACOSX)
   return cmd->HasSwitch(switches::kEnableWheelGestures);
-#else
-  return !cmd->HasSwitch(switches::kDisableWheelGestures);
-#endif
 }
 
 }  // namespace content